21926456 has 16 divisors (see below), whose sum is σ = 43276200. Its totient is φ = 10386144.

The previous prime is 21926453. The next prime is 21926461. The reversal of 21926456 is 65462912.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21926453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71975 + ... + 72278.

Almost surely, 2^21926456 is an apocalyptic number.

It is an amenable number.

21926456 is a deficient number, since it is larger than the sum of its proper divisors (21349744).

21926456 is a wasteful number, since it uses less digits than its factorization.

21926456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144278 (or 144274 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 21926456 is about 4682.5693801587. The cubic root of 21926456 is about 279.8913524051.

The spelling of 21926456 in words is "twenty-one million, nine hundred twenty-six thousand, four hundred fifty-six".