21260553655036 has 24 divisors (see below), whose sum is σ = 38069700883200. Its totient is φ = 10385835412800.

The previous prime is 21260553654997. The next prime is 21260553655039. The reversal of 21260553655036 is 63055635506212.

It is a super-2 number, since 2×21260553655036² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21260553655039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292357660 + ... + 292430371.

It is an arithmetic number, because the mean of its divisors is an integer number (1586237536800).

Almost surely, 2^{21260553655036} is an apocalyptic number.

It is an amenable number.

21260553655036 is a deficient number, since it is larger than the sum of its proper divisors (16809147228164).

21260553655036 is a wasteful number, since it uses less digits than its factorization.

21260553655036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584788245 (or 584788243 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 49.

The spelling of 21260553655036 in words is "twenty-one trillion, two hundred sixty billion, five hundred fifty-three million, six hundred fifty-five thousand, thirty-six".