20236912064 has 56 divisors (see below), whose sum is σ = 42755167728. Its totient is φ = 9470545920.

The previous prime is 20236912063. The next prime is 20236912099. The reversal of 20236912064 is 46021963202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20236912063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145547 + ... + 248309.

It is an arithmetic number, because the mean of its divisors is an integer number (763485138).

Almost surely, 2^20236912064 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 20236912064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21377583864).

20236912064 is an abundant number, since it is smaller than the sum of its proper divisors (22518255664).

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

20236912064 is a wasteful number, since it uses less digits than its factorization.

20236912064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102973 (or 102963 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 20236912064 in words is "twenty billion, two hundred thirty-six million, nine hundred twelve thousand, sixty-four".