21621404102462 has 16 divisors (see below), whose sum is σ = 32444946874032. Its totient is φ = 10806422362560.

The previous prime is 21621404102401. The next prime is 21621404102471. The reversal of 21621404102462 is 26420140412612.

It is a happy number.

It is a super-2 number, since 2×21621404102462² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83228012 + ... + 83487392.

It is an arithmetic number, because the mean of its divisors is an integer number (2027809179627).

Almost surely, 2^{21621404102462} is an apocalyptic number.

21621404102462 is a deficient number, since it is larger than the sum of its proper divisors (10823542771570).

21621404102462 is a wasteful number, since it uses less digits than its factorization.

21621404102462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275723.

The product of its (nonzero) digits is 36864, while the sum is 35.

The spelling of 21621404102462 in words is "twenty-one trillion, six hundred twenty-one billion, four hundred four million, one hundred two thousand, four hundred sixty-two".