20746908432 has 140 divisors (see below), whose sum is σ = 60580771020. Its totient is φ = 6879769344.

The previous prime is 20746908407. The next prime is 20746908451. The reversal of 20746908432 is 23480964702.

20746908432 is a `hidden beast` number, since 207 + 4 + 6 + 9 + 0 + 8 + 432 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20570443776 + 176464656 = 143424^2 + 13284^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2293294 + ... + 2302322.

It is an arithmetic number, because the mean of its divisors is an integer number (432719793).

Almost surely, 2^20746908432 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 20746908432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30290385510).

20746908432 is an abundant number, since it is smaller than the sum of its proper divisors (39833862588).

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

20746908432 is an equidigital number, since it uses as much as digits as its factorization.

20746908432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9252 (or 9231 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 20746908432 in words is "twenty billion, seven hundred forty-six million, nine hundred eight thousand, four hundred thirty-two".