23918540 has 12 divisors (see below), whose sum is σ = 50228976. Its totient is φ = 9567408.

The previous prime is 23918537. The next prime is 23918569. The reversal of 23918540 is 4581932.

It is a junction number, because it is equal to n+sod(n) for n = 23918497 and 23918506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597944 + ... + 597983.

It is an arithmetic number, because the mean of its divisors is an integer number (4185748).

Almost surely, 2^23918540 is an apocalyptic number.

23918540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23918540 is an abundant number, since it is smaller than the sum of its proper divisors (26310436).

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

23918540 is a wasteful number, since it uses less digits than its factorization.

23918540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195936 (or 1195934 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 23918540 is about 4890.6584423777. The cubic root of 23918540 is about 288.1231951082.

The spelling of 23918540 in words is "twenty-three million, nine hundred eighteen thousand, five hundred forty".