21052455324 has 48 divisors (see below), whose sum is σ = 49435577856. Its totient is φ = 6972880000.

The previous prime is 21052455313. The next prime is 21052455337. The reversal of 21052455324 is 42355425012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1290064 + ... + 1306280.

It is an arithmetic number, because the mean of its divisors is an integer number (1029907872).

Almost surely, 2^21052455324 is an apocalyptic number.

It is an amenable number.

21052455324 is an abundant number, since it is smaller than the sum of its proper divisors (28383122532).

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

21052455324 is a wasteful number, since it uses less digits than its factorization.

21052455324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16906 (or 16904 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The spelling of 21052455324 in words is "twenty-one billion, fifty-two million, four hundred fifty-five thousand, three hundred twenty-four".