21620184856310 has 16 divisors (see below), whose sum is σ = 38917765083600. Its totient is φ = 8647755644256.

The previous prime is 21620184856241. The next prime is 21620184856339. The reversal of 21620184856310 is 1365848102612.

It is a super-2 number, since 2×21620184856310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39501905 + ... + 40045484.

It is an arithmetic number, because the mean of its divisors is an integer number (2432360317725).

Almost surely, 2^{21620184856310} is an apocalyptic number.

21620184856310 is a deficient number, since it is larger than the sum of its proper divisors (17297580227290).

21620184856310 is a wasteful number, since it uses less digits than its factorization.

21620184856310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79574575.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 21620184856310 in words is "twenty-one trillion, six hundred twenty billion, one hundred eighty-four million, eight hundred fifty-six thousand, three hundred ten".