20297902872 has 128 divisors (see below), whose sum is σ = 55619524800. Its totient is φ = 6135201792.

The previous prime is 20297902871. The next prime is 20297902909. The reversal of 20297902872 is 27820979202.

It is a super-3 number, since 3×20297902872³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20297902871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6125088 + ... + 6128400.

Almost surely, 2^20297902872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20297902872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27809762400).

20297902872 is an abundant number, since it is smaller than the sum of its proper divisors (35321621928).

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

20297902872 is a wasteful number, since it uses less digits than its factorization.

20297902872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677 (or 3673 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The spelling of 20297902872 in words is "twenty billion, two hundred ninety-seven million, nine hundred two thousand, eight hundred seventy-two".