20379986 has 16 divisors (see below), whose sum is σ = 33753888. Its totient is φ = 9151200.

The previous prime is 20379977. The next prime is 20380033. The reversal of 20379986 is 68997302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3755 + ... + 7406.

It is an arithmetic number, because the mean of its divisors is an integer number (2109618).

Almost surely, 2^20379986 is an apocalyptic number.

20379986 is a deficient number, since it is larger than the sum of its proper divisors (13373902).

20379986 is a wasteful number, since it uses less digits than its factorization.

20379986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11257.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 20379986 is about 4514.4197855317. The cubic root of 20379986 is about 273.1500559307.

The spelling of 20379986 in words is "twenty million, three hundred seventy-nine thousand, nine hundred eighty-six".