23155642530 has 112 divisors (see below), whose sum is σ = 62971280064. Its totient is φ = 6127449120.

The previous prime is 23155642501. The next prime is 23155642537. The reversal of 23155642530 is 3524655132.

23155642530 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 5 + 642 + 5 + 3 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (23155642537) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 942867 + ... + 967113.

It is an arithmetic number, because the mean of its divisors is an integer number (562243572).

Almost surely, 2^23155642530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23155642530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31485640032).

23155642530 is an abundant number, since it is smaller than the sum of its proper divisors (39815637534).

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

23155642530 is a wasteful number, since it uses less digits than its factorization.

23155642530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24403 (or 24388 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 23155642530 in words is "twenty-three billion, one hundred fifty-five million, six hundred forty-two thousand, five hundred thirty".