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23001230220 = 22351812117977
BaseRepresentation
bin10101011010111110…
…101110101110001100
32012100222212120010120
4111122332232232030
5334101303331340
614322220104540
71442664142143
oct253276565614
965328776116
1023001230220
11983365a781
12455b095150
1322274000c7
141182b2c75a
158e94a44d0
hex55afaeb8c

23001230220 has 48 divisors (see below), whose sum is σ = 64759295328. Its totient is φ = 6099770880.

The previous prime is 23001230191. The next prime is 23001230251. The reversal of 23001230220 is 2203210032.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 23001230220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1048129 + ... + 1069848.

It is an arithmetic number, because the mean of its divisors is an integer number (1349151986).

Almost surely, 223001230220 is an apocalyptic number.

23001230220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23001230220 is an abundant number, since it is smaller than the sum of its proper divisors (41758065108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23001230220 is a wasteful number, since it uses less digits than its factorization.

23001230220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118170 (or 2118168 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 23001230220 its reverse (2203210032), we get a palindrome (25204440252).

The spelling of 23001230220 in words is "twenty-three billion, one million, two hundred thirty thousand, two hundred twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 181 362 543 724 905 1086 1810 2172 2715 3620 5430 10860 2117977 4235954 6353931 8471908 10589885 12707862 21179770 25415724 31769655 42359540 63539310 127078620 383353837 766707674 1150061511 1533415348 1916769185 2300123022 3833538370 4600246044 5750307555 7667076740 11500615110 23001230220