20472308 has 12 divisors (see below), whose sum is σ = 35879172. Its totient is φ = 10221120.

The previous prime is 20472299. The next prime is 20472341. The reversal of 20472308 is 80327402.

It can be written as a sum of positive squares in 2 ways, for example, as 14577124 + 5895184 = 3818^2 + 2428^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353 + ... + 6408.

It is an arithmetic number, because the mean of its divisors is an integer number (2989931).

Almost surely, 2^20472308 is an apocalyptic number.

It is an amenable number.

20472308 is a deficient number, since it is larger than the sum of its proper divisors (15406864).

20472308 is a wasteful number, since it uses less digits than its factorization.

20472308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7522 (or 7520 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20472308 is about 4524.6334658180. The cubic root of 20472308 is about 273.5618942234.

The spelling of 20472308 in words is "twenty million, four hundred seventy-two thousand, three hundred eight".