21974274244 has 96 divisors (see below), whose sum is σ = 44758635264. Its totient is φ = 9360299520.

The previous prime is 21974274241. The next prime is 21974274247. The reversal of 21974274244 is 44247247912.

It is an interprime number because it is at equal distance from previous prime (21974274241) and next prime (21974274247).

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 21974274194 and 21974274203.

It is not an unprimeable number, because it can be changed into a prime (21974274241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3863827 + ... + 3869509.

It is an arithmetic number, because the mean of its divisors is an integer number (466235784).

Almost surely, 2^21974274244 is an apocalyptic number.

It is an amenable number.

21974274244 is an abundant number, since it is smaller than the sum of its proper divisors (22784361020).

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

21974274244 is a wasteful number, since it uses less digits than its factorization.

21974274244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5837 (or 5835 counting only the distinct ones).

The product of its digits is 903168, while the sum is 46.

The spelling of 21974274244 in words is "twenty-one billion, nine hundred seventy-four million, two hundred seventy-four thousand, two hundred forty-four".