20002879 has 8 divisors (see below), whose sum is σ = 21815360. Its totient is φ = 18229536.

The previous prime is 20002841. The next prime is 20002907. The reversal of 20002879 is 97820002.

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

It is not a de Polignac number, because 20002879 - 2²³ = 11614271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8712 + ... + 10765.

It is an arithmetic number, because the mean of its divisors is an integer number (2726920).

Almost surely, 2^20002879 is an apocalyptic number.

20002879 is a deficient number, since it is larger than the sum of its proper divisors (1812481).

20002879 is a wasteful number, since it uses less digits than its factorization.

20002879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19569.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 20002879 is about 4472.4578254020. The cubic root of 20002879 is about 271.4547857151.

The spelling of 20002879 in words is "twenty million, two thousand, eight hundred seventy-nine".