23134520 has 16 divisors (see below), whose sum is σ = 52052760. Its totient is φ = 9253792.

The previous prime is 23134513. The next prime is 23134523. The reversal of 23134520 is 2543132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23134492 and 23134501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23134523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289142 + ... + 289221.

Almost surely, 2^23134520 is an apocalyptic number.

23134520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23134520 is an abundant number, since it is smaller than the sum of its proper divisors (28918240).

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

23134520 is a wasteful number, since it uses less digits than its factorization.

23134520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578374 (or 578370 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 23134520 is about 4809.8357560316. The cubic root of 23134520 is about 284.9400510001.

Adding to 23134520 its reverse (2543132), we get a palindrome (25677652).

The spelling of 23134520 in words is "twenty-three million, one hundred thirty-four thousand, five hundred twenty".