20379923 has 4 divisors (see below), whose sum is σ = 21578760. Its totient is φ = 19181088.

The previous prime is 20379907. The next prime is 20379929. The reversal of 20379923 is 32997302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20379923 - 2⁴ = 20379907 is a prime.

It is a super-2 number, since 2×20379923² = 830682522971858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20379929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599393 + ... + 599426.

It is an arithmetic number, because the mean of its divisors is an integer number (5394690).

Almost surely, 2^20379923 is an apocalyptic number.

20379923 is a deficient number, since it is larger than the sum of its proper divisors (1198837).

20379923 is a wasteful number, since it uses less digits than its factorization.

20379923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198836.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 20379923 is about 4514.4128078854. The cubic root of 20379923 is about 273.1497744704.

The spelling of 20379923 in words is "twenty million, three hundred seventy-nine thousand, nine hundred twenty-three".