20115879 has 48 divisors (see below), whose sum is σ = 34115328. Its totient is φ = 10289664.

The previous prime is 20115853. The next prime is 20115883. The reversal of 20115879 is 97851102.

It is not a de Polignac number, because 20115879 - 2⁹ = 20115367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115829) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 300204 + ... + 300270.

It is an arithmetic number, because the mean of its divisors is an integer number (710736).

Almost surely, 2^20115879 is an apocalyptic number.

20115879 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20115879 is a deficient number, since it is larger than the sum of its proper divisors (13999449).

20115879 is a wasteful number, since it uses less digits than its factorization.

20115879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 20115879 is about 4485.0729091064. The cubic root of 20115879 is about 271.9649924308.

The spelling of 20115879 in words is "twenty million, one hundred fifteen thousand, eight hundred seventy-nine".