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23123320 = 2351152553
BaseRepresentation
bin101100000110…
…1010101111000
31121111210020021
41120031111320
521404421240
62143340224
7400354633
oct130152570
947453207
1023123320
1112063990
1278b1674
134a37c4c
1430dcc1a
15206b54a
hex160d578

23123320 has 32 divisors (see below), whose sum is σ = 56758320. Its totient is φ = 8408320.

The previous prime is 23123311. The next prime is 23123333. The reversal of 23123320 is 2332132.

It is a junction number, because it is equal to n+sod(n) for n = 23123294 and 23123303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25837 + ... + 26716.

Almost surely, 223123320 is an apocalyptic number.

23123320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23123320 is an abundant number, since it is smaller than the sum of its proper divisors (33635000).

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

23123320 is a wasteful number, since it uses less digits than its factorization.

23123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52575 (or 52571 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 23123320 is about 4808.6713341629. The cubic root of 23123320 is about 284.8940613749.

Adding to 23123320 its reverse (2332132), we get a palindrome (25455452).

The spelling of 23123320 in words is "twenty-three million, one hundred twenty-three thousand, three hundred twenty".

Divisors: 1 2 4 5 8 10 11 20 22 40 44 55 88 110 220 440 52553 105106 210212 262765 420424 525530 578083 1051060 1156166 2102120 2312332 2890415 4624664 5780830 11561660 23123320