23514540521 has 4 divisors (see below), whose sum is σ = 24536911872. Its totient is φ = 22492169172.

The previous prime is 23514540509. The next prime is 23514540541. The reversal of 23514540521 is 12504541532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23514540521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23514540541) 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, 511185641 + ... + 511185686.

It is an arithmetic number, because the mean of its divisors is an integer number (6134227968).

Almost surely, 2^23514540521 is an apocalyptic number.

It is an amenable number.

23514540521 is a deficient number, since it is larger than the sum of its proper divisors (1022371351).

23514540521 is a wasteful number, since it uses less digits than its factorization.

23514540521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022371350.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 23514540521 in words is "twenty-three billion, five hundred fourteen million, five hundred forty thousand, five hundred twenty-one".