20112988 has 12 divisors (see below), whose sum is σ = 40226032. Its totient is φ = 8619840.

The previous prime is 20112973. The next prime is 20112997. The reversal of 20112988 is 88921102.

It is a happy number.

20112988 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359133 + ... + 359188.

Almost surely, 2^20112988 is an apocalyptic number.

20112988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20112988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20112988 is a wasteful number, since it uses less digits than its factorization.

20112988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718332 (or 718330 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 20112988 is about 4484.7506062210. The cubic root of 20112988 is about 271.9519631144.

The spelling of 20112988 in words is "twenty million, one hundred twelve thousand, nine hundred eighty-eight".