21984324380 has 12 divisors (see below), whose sum is σ = 46167081240. Its totient is φ = 8793729744.

The previous prime is 21984324371. The next prime is 21984324391. The reversal of 21984324380 is 8342348912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549608090 + ... + 549608129.

It is an arithmetic number, because the mean of its divisors is an integer number (3847256770).

Almost surely, 2^21984324380 is an apocalyptic number.

21984324380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21984324380 is an abundant number, since it is smaller than the sum of its proper divisors (24182756860).

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

21984324380 is a wasteful number, since it uses less digits than its factorization.

21984324380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099216228 (or 1099216226 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 21984324380 in words is "twenty-one billion, nine hundred eighty-four million, three hundred twenty-four thousand, three hundred eighty".