20525536800 has 216 divisors, whose sum is σ = 72951330816. Its totient is φ = 5430136320.

The previous prime is 20525536781. The next prime is 20525536813. The reversal of 20525536800 is 863552502.

It is a happy number.

20525536800 is a `hidden beast` number, since 2 + 0 + 525 + 53 + 6 + 80 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 903177 + ... + 925623.

Almost surely, 2^20525536800 is an apocalyptic number.

20525536800 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 20525536800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36475665408).

20525536800 is an abundant number, since it is smaller than the sum of its proper divisors (52425794016).

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

20525536800 is a wasteful number, since it uses less digits than its factorization.

20525536800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22600 (or 22584 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 20525536800 in words is "twenty billion, five hundred twenty-five million, five hundred thirty-six thousand, eight hundred".