20158879 has 8 divisors (see below), whose sum is σ = 22653792. Its totient is φ = 17798880.

The previous prime is 20158871. The next prime is 20158883. The reversal of 20158879 is 97885102.

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 20158879 - 2³ = 20158871 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20158871) 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, 33412 + ... + 34009.

It is an arithmetic number, because the mean of its divisors is an integer number (2831724).

Almost surely, 2^20158879 is an apocalyptic number.

20158879 is a deficient number, since it is larger than the sum of its proper divisors (2494913).

20158879 is a wasteful number, since it uses less digits than its factorization.

20158879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67457.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 20158879 is about 4489.8640291216. The cubic root of 20158879 is about 272.1586399763.

The spelling of 20158879 in words is "twenty million, one hundred fifty-eight thousand, eight hundred seventy-nine".