20536225920 has 256 divisors, whose sum is σ = 83123308800. Its totient is φ = 4693966848.

The previous prime is 20536225891. The next prime is 20536225937. The reversal of 20536225920 is 2952263502.

It is a happy number.

20536225920 is a `hidden beast` number, since 2 + 0 + 5 + 3 + 62 + 2 + 592 + 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 31 ways as a sum of consecutive naturals, for example, 36072 + ... + 205848.

It is an arithmetic number, because the mean of its divisors is an integer number (324700425).

Almost surely, 2^20536225920 is an apocalyptic number.

20536225920 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 20536225920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41561654400).

20536225920 is an abundant number, since it is smaller than the sum of its proper divisors (62587082880).

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

20536225920 is a wasteful number, since it uses less digits than its factorization.

20536225920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169812 (or 169794 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 20536225920 in words is "twenty billion, five hundred thirty-six million, two hundred twenty-five thousand, nine hundred twenty".