21307952466 has 12 divisors (see below), whose sum is σ = 46167230382. Its totient is φ = 7102650816.

The previous prime is 21307952429. The next prime is 21307952489. The reversal of 21307952466 is 66425970312.

21307952466 is a `hidden beast` number, since 2 + 130 + 7 + 9 + 52 + 466 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19969929225 + 1338023241 = 141315^2 + 36579^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 591887551 + ... + 591887586.

Almost surely, 2^21307952466 is an apocalyptic number.

21307952466 is an abundant number, since it is smaller than the sum of its proper divisors (24859277916).

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

21307952466 is a wasteful number, since it uses less digits than its factorization.

21307952466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183775145 (or 1183775142 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 21307952466 in words is "twenty-one billion, three hundred seven million, nine hundred fifty-two thousand, four hundred sixty-six".