20118688 has 12 divisors (see below), whose sum is σ = 39608730. Its totient is φ = 10059328.

The previous prime is 20118677. The next prime is 20118733. The reversal of 20118688 is 88681102.

It can be written as a sum of positive squares in only one way, i.e., 18079504 + 2039184 = 4252^2 + 1428^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314323 + ... + 314386.

Almost surely, 2^20118688 is an apocalyptic number.

It is an amenable number.

20118688 is a deficient number, since it is larger than the sum of its proper divisors (19490042).

20118688 is an equidigital number, since it uses as much as digits as its factorization.

20118688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628719 (or 628711 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 20118688 is about 4485.3860480454. The cubic root of 20118688 is about 271.9776509896.

The spelling of 20118688 in words is "twenty million, one hundred eighteen thousand, six hundred eighty-eight".