21620325971848 has 16 divisors (see below), whose sum is σ = 40538161618380. Its totient is φ = 10810149540288.

The previous prime is 21620325971821. The next prime is 21620325971861. The reversal of 21620325971848 is 84817952302612.

It can be written as a sum of positive squares in 2 ways, for example, as 15032695348804 + 6587630623044 = 3877202^2 + 2566638^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21620325971792 and 21620325971801.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9633586 + ... + 11663902.

It is a 1-persistent number, because it is pandigital, but 2⋅21620325971848 = 43240651943696 is not.

Almost surely, 2^{21620325971848} is an apocalyptic number.

It is an amenable number.

21620325971848 is a deficient number, since it is larger than the sum of its proper divisors (18917835646532).

21620325971848 is a wasteful number, since it uses less digits than its factorization.

21620325971848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361416 (or 3361412 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 58.

The spelling of 21620325971848 in words is "twenty-one trillion, six hundred twenty billion, three hundred twenty-five million, nine hundred seventy-one thousand, eight hundred forty-eight".