23553506421 has 24 divisors (see below), whose sum is σ = 34205685696. Its totient is φ = 15617616000.

The previous prime is 23553506413. The next prime is 23553506423. The reversal of 23553506421 is 12460535532.

23553506421 is a `hidden beast` number, since 2 + 3 + 5 + 5 + 3 + 5 + 0 + 642 + 1 = 666.

It is not a de Polignac number, because 23553506421 - 2³ = 23553506413 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23553506423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1671421 + ... + 1685453.

It is an arithmetic number, because the mean of its divisors is an integer number (1425236904).

Almost surely, 2^23553506421 is an apocalyptic number.

It is an amenable number.

23553506421 is a deficient number, since it is larger than the sum of its proper divisors (10652179275).

23553506421 is a wasteful number, since it uses less digits than its factorization.

23553506421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15033 (or 15030 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 23553506421 in words is "twenty-three billion, five hundred fifty-three million, five hundred six thousand, four hundred twenty-one".