20118788 has 6 divisors (see below), whose sum is σ = 35207886. Its totient is φ = 10059392.

The previous prime is 20118751. The next prime is 20118799. The reversal of 20118788 is 88781102.

It can be written as a sum of positive squares in only one way, i.e., 19784704 + 334084 = 4448^2 + 578^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2514845 + ... + 2514852.

It is an arithmetic number, because the mean of its divisors is an integer number (5867981).

Almost surely, 2^20118788 is an apocalyptic number.

It is an amenable number.

20118788 is a deficient number, since it is larger than the sum of its proper divisors (15089098).

20118788 is a wasteful number, since it uses less digits than its factorization.

20118788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029701 (or 5029699 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 20118788 is about 4485.3971953440. The cubic root of 20118788 is about 271.9781016107.

The spelling of 20118788 in words is "twenty million, one hundred eighteen thousand, seven hundred eighty-eight".