23137530 has 64 divisors (see below), whose sum is σ = 61302528. Its totient is φ = 5552640.

The previous prime is 23137529. The next prime is 23137537. The reversal of 23137530 is 3573132.

It is a self number, because there is not a number n which added to its sum of digits gives 23137530.

It is not an unprimeable number, because it can be changed into a prime (23137537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15267 + ... + 16713.

It is an arithmetic number, because the mean of its divisors is an integer number (957852).

Almost surely, 2^23137530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23137530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30651264).

23137530 is an abundant number, since it is smaller than the sum of its proper divisors (38164998).

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

23137530 is a wasteful number, since it uses less digits than its factorization.

23137530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511.

The product of its (nonzero) digits is 1890, while the sum is 24.

The square root of 23137530 is about 4810.1486463518. The cubic root of 23137530 is about 284.9524081812.

The spelling of 23137530 in words is "twenty-three million, one hundred thirty-seven thousand, five hundred thirty".