21106753570 has 32 divisors (see below), whose sum is σ = 43761512448. Its totient is φ = 7179617088.

The previous prime is 21106753567. The next prime is 21106753583. The reversal of 21106753570 is 7535760112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1178217 + ... + 1195996.

It is an arithmetic number, because the mean of its divisors is an integer number (1367547264).

Almost surely, 2^21106753570 is an apocalyptic number.

21106753570 is an abundant number, since it is smaller than the sum of its proper divisors (22654758878).

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

21106753570 is a wasteful number, since it uses less digits than its factorization.

21106753570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374354.

The product of its (nonzero) digits is 44100, while the sum is 37.

The spelling of 21106753570 in words is "twenty-one billion, one hundred six million, seven hundred fifty-three thousand, five hundred seventy".