20698607290 has 8 divisors (see below), whose sum is σ = 37257493140. Its totient is φ = 8279442912.

The previous prime is 20698607287. The next prime is 20698607297. The reversal of 20698607290 is 9270689602.

It can be written as a sum of positive squares in 2 ways, for example, as 20426983929 + 271623361 = 142923^2 + 16481^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20698607290² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20698607297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1034930355 + ... + 1034930374.

Almost surely, 2^20698607290 is an apocalyptic number.

20698607290 is a deficient number, since it is larger than the sum of its proper divisors (16558885850).

20698607290 is a wasteful number, since it uses less digits than its factorization.

20698607290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069860736.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 20698607290 in words is "twenty billion, six hundred ninety-eight million, six hundred seven thousand, two hundred ninety".