21620477607430 has 128 divisors (see below), whose sum is σ = 43619627520000. Its totient is φ = 7661760883200.

The previous prime is 21620477607419. The next prime is 21620477607433. The reversal of 21620477607430 is 3470677402612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21620477607433) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 543905196 + ... + 543944944.

It is an arithmetic number, because the mean of its divisors is an integer number (340778340000).

Almost surely, 2^{21620477607430} is an apocalyptic number.

21620477607430 is an abundant number, since it is smaller than the sum of its proper divisors (21999149912570).

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

21620477607430 is a wasteful number, since it uses less digits than its factorization.

21620477607430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40910.

The product of its (nonzero) digits is 2370816, while the sum is 49.

The spelling of 21620477607430 in words is "twenty-one trillion, six hundred twenty billion, four hundred seventy-seven million, six hundred seven thousand, four hundred thirty".