20017399252 has 6 divisors (see below), whose sum is σ = 35030448698. Its totient is φ = 10008699624.

The previous prime is 20017399249. The next prime is 20017399253. The reversal of 20017399252 is 25299371002.

It can be written as a sum of positive squares in only one way, i.e., 19364392336 + 653006916 = 139156^2 + 25554^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20017399253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2502174903 + ... + 2502174910.

Almost surely, 2^20017399252 is an apocalyptic number.

It is an amenable number.

20017399252 is a deficient number, since it is larger than the sum of its proper divisors (15013049446).

20017399252 is a wasteful number, since it uses less digits than its factorization.

20017399252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004349817 (or 5004349815 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 40.

The spelling of 20017399252 in words is "twenty billion, seventeen million, three hundred ninety-nine thousand, two hundred fifty-two".