23145102520 has 16 divisors (see below), whose sum is σ = 52076480760. Its totient is φ = 9258040992.

The previous prime is 23145102517. The next prime is 23145102521. The reversal of 23145102520 is 2520154132.

It is a super-2 number, since 2×23145102520² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23145102521) 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, 289313742 + ... + 289313821.

Almost surely, 2^23145102520 is an apocalyptic number.

23145102520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23145102520 is an abundant number, since it is smaller than the sum of its proper divisors (28931378240).

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

23145102520 is a wasteful number, since it uses less digits than its factorization.

23145102520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578627574 (or 578627570 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 23145102520 its reverse (2520154132), we get a palindrome (25665256652).

The spelling of 23145102520 in words is "twenty-three billion, one hundred forty-five million, one hundred two thousand, five hundred twenty".