21974496 has 24 divisors (see below), whose sum is σ = 57683304. Its totient is φ = 7324800.

The previous prime is 21974479. The next prime is 21974501. The reversal of 21974496 is 69447912.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×21974496³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 114355 + ... + 114546.

It is an arithmetic number, because the mean of its divisors is an integer number (2403471).

Almost surely, 2^21974496 is an apocalyptic number.

It is an amenable number.

21974496 is an abundant number, since it is smaller than the sum of its proper divisors (35708808).

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

21974496 is a wasteful number, since it uses less digits than its factorization.

21974496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228914 (or 228906 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 21974496 is about 4687.6962358924. The cubic root of 21974496 is about 280.0956136049.

The spelling of 21974496 in words is "twenty-one million, nine hundred seventy-four thousand, four hundred ninety-six".