20879888 has 20 divisors (see below), whose sum is σ = 40531260. Its totient is φ = 10420224.

The previous prime is 20879869. The next prime is 20879909. The reversal of 20879888 is 88897802.

It can be written as a sum of positive squares in 2 ways, for example, as 15272464 + 5607424 = 3908^2 + 2368^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11456 + ... + 13152.

It is an arithmetic number, because the mean of its divisors is an integer number (2026563).

Almost surely, 2^20879888 is an apocalyptic number.

It is an amenable number.

20879888 is a deficient number, since it is larger than the sum of its proper divisors (19651372).

20879888 is a wasteful number, since it uses less digits than its factorization.

20879888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474 (or 2468 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 50.

The square root of 20879888 is about 4569.4516082348. The cubic root of 20879888 is about 275.3654117574.

The spelling of 20879888 in words is "twenty million, eight hundred seventy-nine thousand, eight hundred eighty-eight".