20293979 has 8 divisors (see below), whose sum is σ = 20826432. Its totient is φ = 19764360.

The previous prime is 20293963. The next prime is 20294003. The reversal of 20293979 is 97939202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20293979 - 2⁴ = 20293963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20293909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29024 + ... + 29714.

It is an arithmetic number, because the mean of its divisors is an integer number (2603304).

Almost surely, 2^20293979 is an apocalyptic number.

20293979 is a deficient number, since it is larger than the sum of its proper divisors (532453).

20293979 is an equidigital number, since it uses as much as digits as its factorization.

20293979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 20293979 is about 4504.8839052744. The cubic root of 20293979 is about 272.7652675988.

The spelling of 20293979 in words is "twenty million, two hundred ninety-three thousand, nine hundred seventy-nine".