23326540021 has 32 divisors (see below), whose sum is σ = 25840425600. Its totient is φ = 20958013440.

The previous prime is 23326540019. The next prime is 23326540043. The reversal of 23326540021 is 12004562332.

It is not a de Polignac number, because 23326540021 - 2¹ = 23326540019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23326540051) 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, 24476481 + ... + 24477433.

It is an arithmetic number, because the mean of its divisors is an integer number (807513300).

Almost surely, 2^23326540021 is an apocalyptic number.

It is an amenable number.

23326540021 is a deficient number, since it is larger than the sum of its proper divisors (2513885579).

23326540021 is a wasteful number, since it uses less digits than its factorization.

23326540021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509.

The product of its (nonzero) digits is 8640, while the sum is 28.

The spelling of 23326540021 in words is "twenty-three billion, three hundred twenty-six million, five hundred forty thousand, twenty-one".