20372979900 has 864 divisors, whose sum is σ = 80681502720. Its totient is φ = 3919104000.

The previous prime is 20372979889. The next prime is 20372979929. The reversal of 20372979900 is 997927302.

It is a self number, because there is not a number n which added to its sum of digits gives 20372979900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 112557810 + ... + 112557990.

Almost surely, 2^20372979900 is an apocalyptic number.

20372979900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20372979900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40340751360).

20372979900 is an abundant number, since it is smaller than the sum of its proper divisors (60308522820).

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

20372979900 is a wasteful number, since it uses less digits than its factorization.

20372979900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 428652, while the sum is 48.

The spelling of 20372979900 in words is "twenty billion, three hundred seventy-two million, nine hundred seventy-nine thousand, nine hundred".