20026630656 has 240 divisors, whose sum is σ = 61953338304. Its totient is φ = 6211510272.

The previous prime is 20026630627. The next prime is 20026630697. The reversal of 20026630656 is 65603662002.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20026630656.

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, 3918855 + ... + 3923961.

Almost surely, 2^20026630656 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 20026630656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30976669152).

20026630656 is an abundant number, since it is smaller than the sum of its proper divisors (41926707648).

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

20026630656 is a wasteful number, since it uses less digits than its factorization.

20026630656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5191 (or 5172 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 20026630656 in words is "twenty billion, twenty-six million, six hundred thirty thousand, six hundred fifty-six".