20479293 has 6 divisors (see below), whose sum is σ = 29581214. Its totient is φ = 13652856.

The previous prime is 20479279. The next prime is 20479297. The reversal of 20479293 is 39297402.

It can be written as a sum of positive squares in only one way, i.e., 16305444 + 4173849 = 4038^2 + 2043^2 .

It is not a de Polignac number, because 20479293 - 2⁶ = 20479229 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 (20479297) 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, 1137730 + ... + 1137747.

Almost surely, 2^20479293 is an apocalyptic number.

It is an amenable number.

20479293 is a deficient number, since it is larger than the sum of its proper divisors (9101921).

20479293 is a wasteful number, since it uses less digits than its factorization.

20479293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275483 (or 2275480 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 20479293 is about 4525.4052857175. The cubic root of 20479293 is about 273.5930031170.

It can be divided in two parts, 204 and 79293, that added together give a palindrome (79497).

The spelling of 20479293 in words is "twenty million, four hundred seventy-nine thousand, two hundred ninety-three".