21164003624344 has 32 divisors (see below), whose sum is σ = 45353967991200. Its totient is φ = 9069780936960.

The previous prime is 21164003624341. The next prime is 21164003624371. The reversal of 21164003624344 is 44342630046112.

It is a super-2 number, since 2×21164003624344² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21164003624297 and 21164003624306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21164003624341) 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, 9535567 + ... + 11543614.

It is an arithmetic number, because the mean of its divisors is an integer number (1417311499725).

Almost surely, 2^{21164003624344} is an apocalyptic number.

It is an amenable number.

21164003624344 is an abundant number, since it is smaller than the sum of its proper divisors (24189964366856).

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

21164003624344 is a wasteful number, since it uses less digits than its factorization.

21164003624344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21097123 (or 21097119 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 40.

The spelling of 21164003624344 in words is "twenty-one trillion, one hundred sixty-four billion, three million, six hundred twenty-four thousand, three hundred forty-four".