21466925685 has 24 divisors (see below), whose sum is σ = 38827137024. Its totient is φ = 10951242720.

The previous prime is 21466925657. The next prime is 21466925687. The reversal of 21466925685 is 58652966412.

21466925685 is a `hidden beast` number, since 2 + 14 + 6 + 69 + 2 + 568 + 5 = 666.

It is not a de Polignac number, because 21466925685 - 2⁶ = 21466925621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21466925687) 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, 10369461 + ... + 10371530.

It is an arithmetic number, because the mean of its divisors is an integer number (1617797376).

Almost surely, 2^21466925685 is an apocalyptic number.

It is an amenable number.

21466925685 is a deficient number, since it is larger than the sum of its proper divisors (17360211339).

21466925685 is a wasteful number, since it uses less digits than its factorization.

21466925685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20741025 (or 20741022 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 21466925685 in words is "twenty-one billion, four hundred sixty-six million, nine hundred twenty-five thousand, six hundred eighty-five".