20102686400 has 84 divisors (see below), whose sum is σ = 49501412808. Its totient is φ = 8035184640.

The previous prime is 20102686391. The next prime is 20102686423. The reversal of 20102686400 is 468620102.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2663432 + ... + 2670968.

Almost surely, 2^20102686400 is an apocalyptic number.

20102686400 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 20102686400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24750706404).

20102686400 is an abundant number, since it is smaller than the sum of its proper divisors (29398726408).

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

20102686400 is a wasteful number, since it uses less digits than its factorization.

20102686400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9226 (or 9211 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 20102686400 in words is "twenty billion, one hundred two million, six hundred eighty-six thousand, four hundred".