21364227555704 has 32 divisors (see below), whose sum is σ = 44298180437040. Its totient is φ = 9577984953600.

The previous prime is 21364227555673. The next prime is 21364227555707. The reversal of 21364227555704 is 40755572246312.

It is a happy number.

It is a super-2 number, since 2×21364227555704² (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 (21364227555707) 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, 1662838187 + ... + 1662851034.

Almost surely, 2^{21364227555704} is an apocalyptic number.

It is an amenable number.

21364227555704 is an abundant number, since it is smaller than the sum of its proper divisors (22933952881336).

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

21364227555704 is a wasteful number, since it uses less digits than its factorization.

21364227555704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325689311 (or 3325689307 counting only the distinct ones).

The product of its (nonzero) digits is 14112000, while the sum is 53.

The spelling of 21364227555704 in words is "twenty-one trillion, three hundred sixty-four billion, two hundred twenty-seven million, five hundred fifty-five thousand, seven hundred four".