21360470957 has 12 divisors (see below), whose sum is σ = 24520396320. Its totient is φ = 18228011016.

The previous prime is 21360470951. The next prime is 21360470959. The reversal of 21360470957 is 75907406312.

It is not a de Polignac number, because 21360470957 - 2⁴ = 21360470941 is a prime.

It is a hoax number, since the sum of its digits (44) 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 (21360470951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331094 + ... + 390312.

It is an arithmetic number, because the mean of its divisors is an integer number (2043366360).

Almost surely, 2^21360470957 is an apocalyptic number.

It is an amenable number.

21360470957 is a deficient number, since it is larger than the sum of its proper divisors (3159925363).

21360470957 is an frugal number, since it uses more digits than its factorization.

21360470957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59680 (or 59453 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 21360470957 in words is "twenty-one billion, three hundred sixty million, four hundred seventy thousand, nine hundred fifty-seven".