20379666 has 32 divisors (see below), whose sum is σ = 43727040. Its totient is φ = 6312384.

The previous prime is 20379649. The next prime is 20379691. The reversal of 20379666 is 66697302.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4356 + ... + 7728.

It is an arithmetic number, because the mean of its divisors is an integer number (1366470).

Almost surely, 2^20379666 is an apocalyptic number.

20379666 is an abundant number, since it is smaller than the sum of its proper divisors (23347374).

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

20379666 is a wasteful number, since it uses less digits than its factorization.

20379666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 20379666 is about 4514.3843434072. The cubic root of 20379666 is about 273.1486262850.

The spelling of 20379666 in words is "twenty million, three hundred seventy-nine thousand, six hundred sixty-six".