20459909232 has 600 divisors, whose sum is σ = 74986391040. Its totient is φ = 5349576960.

The previous prime is 20459909231. The next prime is 20459909237. The reversal of 20459909232 is 23290995402.

20459909232 is a `hidden beast` number, since 20 + 4 + 599 + 0 + 9 + 2 + 32 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20459909231) by changing a digit.

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 119 ways as a sum of consecutive naturals, for example, 37403583 + ... + 37404129.

Almost surely, 2^20459909232 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 20459909232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37493195520).

20459909232 is an abundant number, since it is smaller than the sum of its proper divisors (54526481808).

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

20459909232 is a wasteful number, since it uses less digits than its factorization.

20459909232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 20459909232 in words is "twenty billion, four hundred fifty-nine million, nine hundred nine thousand, two hundred thirty-two".