20793877956 has 96 divisors (see below), whose sum is σ = 54573281280. Its totient is φ = 6846407712.

The previous prime is 20793877933. The next prime is 20793877957. The reversal of 20793877956 is 65977839702.

It is a junction number, because it is equal to n+sod(n) for n = 20793877893 and 20793877902.

It is not an unprimeable number, because it can be changed into a prime (20793877957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4238601 + ... + 4243503.

It is an arithmetic number, because the mean of its divisors is an integer number (568471680).

Almost surely, 2^20793877956 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 20793877956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27286640640).

20793877956 is an abundant number, since it is smaller than the sum of its proper divisors (33779403324).

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

20793877956 is a wasteful number, since it uses less digits than its factorization.

20793877956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5390 (or 5382 counting only the distinct ones).

The product of its (nonzero) digits is 40007520, while the sum is 63.

The spelling of 20793877956 in words is "twenty billion, seven hundred ninety-three million, eight hundred seventy-seven thousand, nine hundred fifty-six".