21416433732 has 36 divisors (see below), whose sum is σ = 54468122800. Its totient is φ = 7095012912.

The previous prime is 21416433707. The next prime is 21416433751. The reversal of 21416433732 is 23733461412.

21416433732 is a `hidden beast` number, since 2 + 1 + 4 + 1 + 643 + 3 + 7 + 3 + 2 = 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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1818982 + ... + 1830717.

Almost surely, 2^21416433732 is an apocalyptic number.

It is an amenable number.

21416433732 is an abundant number, since it is smaller than the sum of its proper divisors (33051689068).

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

21416433732 is a wasteful number, since it uses less digits than its factorization.

21416433732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649872 (or 3649867 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The spelling of 21416433732 in words is "twenty-one billion, four hundred sixteen million, four hundred thirty-three thousand, seven hundred thirty-two".