20512602318 has 64 divisors (see below), whose sum is σ = 44722847232. Its totient is φ = 6234641280.

The previous prime is 20512602317. The next prime is 20512602361. The reversal of 20512602318 is 81320621502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512602317) 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, 2118408 + ... + 2128068.

It is an arithmetic number, because the mean of its divisors is an integer number (698794488).

Almost surely, 2^20512602318 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20512602318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22361423616).

20512602318 is an abundant number, since it is smaller than the sum of its proper divisors (24210244914).

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

20512602318 is a wasteful number, since it uses less digits than its factorization.

20512602318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10009.

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 20512602318 in words is "twenty billion, five hundred twelve million, six hundred two thousand, three hundred eighteen".