20816025600 has 288 divisors, whose sum is σ = 70140666960. Its totient is φ = 5444075520.

The previous prime is 20816025569. The next prime is 20816025611. The reversal of 20816025600 is 652061802.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 8139522 + ... + 8142078.

Almost surely, 2^20816025600 is an apocalyptic number.

20816025600 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 20816025600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35070333480).

20816025600 is an abundant number, since it is smaller than the sum of its proper divisors (49324641360).

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

20816025600 is a wasteful number, since it uses less digits than its factorization.

20816025600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645 (or 2620 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 20816025600 in words is "twenty billion, eight hundred sixteen million, twenty-five thousand, six hundred".