21603266363344 has 40 divisors (see below), whose sum is σ = 42236911251720. Its totient is φ = 10703853846528.

The previous prime is 21603266363333. The next prime is 21603266363353. The reversal of 21603266363344 is 44336366230612.

It can be written as a sum of positive squares in 4 ways, for example, as 2376900558400 + 19226365804944 = 1541720^2 + 4384788^2 .

It is a super-2 number, since 2×21603266363344² (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, 12817039 + ... + 14404270.

It is an arithmetic number, because the mean of its divisors is an integer number (1055922781293).

Almost surely, 2^{21603266363344} is an apocalyptic number.

It is an amenable number.

21603266363344 is a deficient number, since it is larger than the sum of its proper divisors (20633644888376).

21603266363344 is a wasteful number, since it uses less digits than its factorization.

21603266363344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27221767 (or 27221761 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 49.

The spelling of 21603266363344 in words is "twenty-one trillion, six hundred three billion, two hundred sixty-six million, three hundred sixty-three thousand, three hundred forty-four".