21357532565010 has 32 divisors (see below), whose sum is σ = 56953420174080. Its totient is φ = 5695342017264.

The previous prime is 21357532565003. The next prime is 21357532565027. The reversal of 21357532565010 is 1056523575312.

21357532565010 is a `hidden beast` number, since 2 + 1 + 3 + 5 + 7 + 532 + 56 + 50 + 10 = 666.

It is a super-2 number, since 2×21357532565010² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39550985962 + ... + 39550986501.

It is an arithmetic number, because the mean of its divisors is an integer number (1779794380440).

Almost surely, 2^{21357532565010} is an apocalyptic number.

21357532565010 is an abundant number, since it is smaller than the sum of its proper divisors (35595887609070).

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

21357532565010 is a wasteful number, since it uses less digits than its factorization.

21357532565010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79101972479 (or 79101972473 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 45.

The spelling of 21357532565010 in words is "twenty-one trillion, three hundred fifty-seven billion, five hundred thirty-two million, five hundred sixty-five thousand, ten".