21433216188 has 24 divisors (see below), whose sum is σ = 50013492480. Its totient is φ = 7144026160.

The previous prime is 21433216169. The next prime is 21433216213. The reversal of 21433216188 is 88161233412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276733 + ... + 345611.

It is an arithmetic number, because the mean of its divisors is an integer number (2083895520).

Almost surely, 2^21433216188 is an apocalyptic number.

It is an amenable number.

21433216188 is an abundant number, since it is smaller than the sum of its proper divisors (28580276292).

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

21433216188 is a wasteful number, since it uses less digits than its factorization.

21433216188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94817 (or 94815 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The spelling of 21433216188 in words is "twenty-one billion, four hundred thirty-three million, two hundred sixteen thousand, one hundred eighty-eight".