20001395232 has 384 divisors, whose sum is σ = 72831467520. Its totient is φ = 5199344640.

The previous prime is 20001395159. The next prime is 20001395257. The reversal of 20001395232 is 23259310002.

20001395232 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 139 + 523 + 2 = 666.

It is a super-2 number, since 2×20001395232² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20001395196 and 20001395205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5580513 + ... + 5584095.

It is an arithmetic number, because the mean of its divisors is an integer number (189665280).

Almost surely, 2^20001395232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001395232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36415733760).

20001395232 is an abundant number, since it is smaller than the sum of its proper divisors (52830072288).

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

20001395232 is a wasteful number, since it uses less digits than its factorization.

20001395232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693 (or 3679 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The spelling of 20001395232 in words is "twenty billion, one million, three hundred ninety-five thousand, two hundred thirty-two".