20811935232 has 560 divisors, whose sum is σ = 70362250992. Its totient is φ = 6091407360.

The previous prime is 20811935213. The next prime is 20811935303. The reversal of 20811935232 is 23253911802.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 151911868 + ... + 151912004.

Almost surely, 2^20811935232 is an apocalyptic number.

20811935232 is a gapful number since it is divisible by the number (22) 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 20811935232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35181125496).

20811935232 is an abundant number, since it is smaller than the sum of its proper divisors (49550315760).

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

20811935232 is an equidigital number, since it uses as much as digits as its factorization.

20811935232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 20811935232 in words is "twenty billion, eight hundred eleven million, nine hundred thirty-five thousand, two hundred thirty-two".