21366540260004 has 24 divisors (see below), whose sum is σ = 52787922995808. Its totient is φ = 6703228316800.

The previous prime is 21366540259913. The next prime is 21366540260027. The reversal of 21366540260004 is 40006204566312.

It is a super-3 number, since 3×21366540260004³ (a number of 41 digits) contains 333 as substring.

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, 52368971022 + ... + 52368971429.

It is an arithmetic number, because the mean of its divisors is an integer number (2199496791492).

Almost surely, 2^{21366540260004} is an apocalyptic number.

It is an amenable number.

21366540260004 is an abundant number, since it is smaller than the sum of its proper divisors (31421382735804).

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

21366540260004 is a wasteful number, since it uses less digits than its factorization.

21366540260004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104737942475 (or 104737942473 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 21366540260004 in words is "twenty-one trillion, three hundred sixty-six billion, five hundred forty million, two hundred sixty thousand, four".