20017051700 has 18 divisors (see below), whose sum is σ = 43437002406. Its totient is φ = 8006820640.

The previous prime is 20017051697. The next prime is 20017051711. The reversal of 20017051700 is 715071002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3798010384 + 16219041316 = 61628^2 + 127354^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100085159 + ... + 100085358.

Almost surely, 2^20017051700 is an apocalyptic number.

20017051700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20017051700 is an abundant number, since it is smaller than the sum of its proper divisors (23419950706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20017051700 is a wasteful number, since it uses less digits than its factorization.

20017051700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200170531 (or 200170524 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 23.

The spelling of 20017051700 in words is "twenty billion, seventeen million, fifty-one thousand, seven hundred".