20677903900 has 72 divisors (see below), whose sum is σ = 47236914144. Its totient is φ = 7841433600.

The previous prime is 20677903859. The next prime is 20677903919. The reversal of 20677903900 is 930977602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220120 + ... + 299680.

It is an arithmetic number, because the mean of its divisors is an integer number (656068252).

Almost surely, 2^20677903900 is an apocalyptic number.

20677903900 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 20677903900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23618457072).

20677903900 is an abundant number, since it is smaller than the sum of its proper divisors (26559010244).

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

20677903900 is a wasteful number, since it uses less digits than its factorization.

20677903900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79711 (or 79704 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 43.

The spelling of 20677903900 in words is "twenty billion, six hundred seventy-seven million, nine hundred three thousand, nine hundred".