20810622672 has 120 divisors (see below), whose sum is σ = 66753900096. Its totient is φ = 5928657408.

The previous prime is 20810622661. The next prime is 20810622713. The reversal of 20810622672 is 27622601802.

20810622672 is a `hidden beast` number, since 20 + 8 + 1 + 0 + 622 + 6 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 320028 + ... + 379524.

Almost surely, 2^20810622672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20810622672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33376950048).

20810622672 is an abundant number, since it is smaller than the sum of its proper divisors (45943277424).

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

20810622672 is a wasteful number, since it uses less digits than its factorization.

20810622672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59865 (or 59856 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 20810622672 in words is "twenty billion, eight hundred ten million, six hundred twenty-two thousand, six hundred seventy-two".