Search a number
-
+
23000231020 = 22513636113907
BaseRepresentation
bin10101011010111010…
…111010110001101100
32012100220222210111011
4111122322322301230
5334101024343040
614322142435004
71442652511054
oct253272726154
965326883434
1023000231020
119833037a98
12455a892a64
132227140370
14118294c564
158e93583ea
hex55aebac6c

23000231020 has 48 divisors (see below), whose sum is σ = 52027825248. Its totient is φ = 8490447360.

The previous prime is 23000231017. The next prime is 23000231021. The reversal of 23000231020 is 2013200032.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (23000231021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1646907 + ... + 1660813.

It is an arithmetic number, because the mean of its divisors is an integer number (1083913026).

Almost surely, 223000231020 is an apocalyptic number.

23000231020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23000231020 is an abundant number, since it is smaller than the sum of its proper divisors (29027594228).

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

23000231020 is a wasteful number, since it uses less digits than its factorization.

23000231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20290 (or 20288 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 23000231020 its reverse (2013200032), we get a palindrome (25013431052).

The spelling of 23000231020 in words is "twenty-three billion, two hundred thirty-one thousand, twenty".

Divisors: 1 2 4 5 10 13 20 26 52 65 130 260 6361 12722 13907 25444 27814 31805 55628 63610 69535 82693 127220 139070 165386 180791 278140 330772 361582 413465 723164 826930 903955 1653860 1807910 3615820 88462427 176924854 353849708 442312135 884624270 1150011551 1769248540 2300023102 4600046204 5750057755 11500115510 23000231020