20432445516 has 72 divisors (see below), whose sum is σ = 60231735200. Its totient is φ = 5837838048.

The previous prime is 20432445497. The next prime is 20432445521. The reversal of 20432445516 is 61554423402.

20432445516 is a `hidden beast` number, since 20 + 43 + 2 + 44 + 551 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 815011 + ... + 839706.

Almost surely, 2^20432445516 is an apocalyptic number.

It is an amenable number.

20432445516 is an abundant number, since it is smaller than the sum of its proper divisors (39799289684).

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

20432445516 is a wasteful number, since it uses less digits than its factorization.

20432445516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654748 (or 1654729 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 20432445516 its reverse (61554423402), we get a palindrome (81986868918).

The spelling of 20432445516 in words is "twenty billion, four hundred thirty-two million, four hundred forty-five thousand, five hundred sixteen".