20517032170 has 32 divisors (see below), whose sum is σ = 37117690128. Its totient is φ = 8165326848.

The previous prime is 20517032147. The next prime is 20517032209. The reversal of 20517032170 is 7123071502.

It can be written as a sum of positive squares in 8 ways, for example, as 10648795249 + 9868236921 = 103193^2 + 99339^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2445022 + ... + 2453398.

Almost surely, 2^20517032170 is an apocalyptic number.

20517032170 is a deficient number, since it is larger than the sum of its proper divisors (16600657958).

20517032170 is a wasteful number, since it uses less digits than its factorization.

20517032170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9594.

The product of its (nonzero) digits is 2940, while the sum is 28.

The spelling of 20517032170 in words is "twenty billion, five hundred seventeen million, thirty-two thousand, one hundred seventy".