21974796 has 36 divisors (see below), whose sum is σ = 55691272. Its totient is φ = 7305984.

The previous prime is 21974789. The next prime is 21974809. The reversal of 21974796 is 69747912.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23775 + ... + 24681.

Almost surely, 2^21974796 is an apocalyptic number.

It is an amenable number.

21974796 is an abundant number, since it is smaller than the sum of its proper divisors (33716476).

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

21974796 is a wasteful number, since it uses less digits than its factorization.

21974796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590 (or 1585 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 21974796 is about 4687.7282344436. The cubic root of 21974796 is about 280.0968882387.

The spelling of 21974796 in words is "twenty-one million, nine hundred seventy-four thousand, seven hundred ninety-six".