20321983458432 has 160 divisors (see below), whose sum is σ = 60481146060720. Its totient is φ = 6773630178816.

The previous prime is 20321983458397. The next prime is 20321983458433. The reversal of 20321983458432 is 23485438912302.

20321983458432 is a `hidden beast` number, since 2 + 0 + 3 + 2 + 198 + 345 + 84 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (20321983458433) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 249900723 + ... + 249982029.

Almost surely, 2^{20321983458432} 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 20321983458432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30240573030360).

20321983458432 is an abundant number, since it is smaller than the sum of its proper divisors (40159162602288).

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

20321983458432 is an equidigital number, since it uses as much as digits as its factorization.

20321983458432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105440 (or 105419 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 54.

The spelling of 20321983458432 in words is "twenty trillion, three hundred twenty-one billion, nine hundred eighty-three million, four hundred fifty-eight thousand, four hundred thirty-two".