21375724470740 has 48 divisors (see below), whose sum is σ = 45019339686720. Its totient is φ = 8525499490560.

The previous prime is 21375724470733. The next prime is 21375724470773. The reversal of 21375724470740 is 4707442757312.

It is a super-2 number, since 2×21375724470740² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9611399 + ... + 11624561.

It is an arithmetic number, because the mean of its divisors is an integer number (937902910140).

Almost surely, 2^{21375724470740} is an apocalyptic number.

21375724470740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21375724470740 is an abundant number, since it is smaller than the sum of its proper divisors (23643615215980).

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

21375724470740 is a wasteful number, since it uses less digits than its factorization.

21375724470740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014712 (or 2014710 counting only the distinct ones).

The product of its (nonzero) digits is 9219840, while the sum is 53.

The spelling of 21375724470740 in words is "twenty-one trillion, three hundred seventy-five billion, seven hundred twenty-four million, four hundred seventy thousand, seven hundred forty".