13221774432 has 36 divisors (see below), whose sum is σ = 37599421860. Its totient is φ = 4407258048.

The previous prime is 13221774413. The next prime is 13221774437. The reversal of 13221774432 is 23447712231.

13221774432 is a `hidden beast` number, since 1 + 3 + 2 + 217 + 7 + 4 + 432 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221774437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22954182 + ... + 22954757.

It is an arithmetic number, because the mean of its divisors is an integer number (1044428385).

Almost surely, 2^13221774432 is an apocalyptic number.

13221774432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13221774432 is an abundant number, since it is smaller than the sum of its proper divisors (24377647428).

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

13221774432 is a wasteful number, since it uses less digits than its factorization.

13221774432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45908955 (or 45908944 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The spelling of 13221774432 in words is "thirteen billion, two hundred twenty-one million, seven hundred seventy-four thousand, four hundred thirty-two".