20479113 has 6 divisors (see below), whose sum is σ = 29580954. Its totient is φ = 13652736.

The previous prime is 20479097. The next prime is 20479117. The reversal of 20479113 is 31197402.

It can be written as a sum of positive squares in only one way, i.e., 10575504 + 9903609 = 3252^2 + 3147^2 .

It is not a de Polignac number, because 20479113 - 2⁴ = 20479097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20479117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1137720 + ... + 1137737.

It is an arithmetic number, because the mean of its divisors is an integer number (4930159).

Almost surely, 2^20479113 is an apocalyptic number.

It is an amenable number.

20479113 is a deficient number, since it is larger than the sum of its proper divisors (9101841).

20479113 is a wasteful number, since it uses less digits than its factorization.

20479113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275463 (or 2275460 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 20479113 is about 4525.3853979523. The cubic root of 20479113 is about 273.5922015449.

The spelling of 20479113 in words is "twenty million, four hundred seventy-nine thousand, one hundred thirteen".