20477744832 has 168 divisors, whose sum is σ = 56570497984. Its totient is φ = 6533968896.

The previous prime is 20477744827. The next prime is 20477744867. The reversal of 20477744832 is 23844777402.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23190663 + ... + 23191545.

Almost surely, 2^20477744832 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 20477744832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28285248992).

20477744832 is an abundant number, since it is smaller than the sum of its proper divisors (36092753152).

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

20477744832 is an equidigital number, since it uses as much as digits as its factorization.

20477744832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 48.

The spelling of 20477744832 in words is "twenty billion, four hundred seventy-seven million, seven hundred forty-four thousand, eight hundred thirty-two".