21222474984 has 48 divisors (see below), whose sum is σ = 59606339520. Its totient is φ = 7074157680.

The previous prime is 21222474961. The next prime is 21222474989. The reversal of 21222474984 is 48947422212.

It is not an unprimeable number, because it can be changed into a prime (21222474989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5456512 + ... + 5460399.

It is an arithmetic number, because the mean of its divisors is an integer number (1241798740).

Almost surely, 2^21222474984 is an apocalyptic number.

21222474984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21222474984 is an abundant number, since it is smaller than the sum of its proper divisors (38383864536).

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

21222474984 is a wasteful number, since it uses less digits than its factorization.

21222474984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10916932 (or 10916916 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The spelling of 21222474984 in words is "twenty-one billion, two hundred twenty-two million, four hundred seventy-four thousand, nine hundred eighty-four".