21916462 has 8 divisors (see below), whose sum is σ = 34605000. Its totient is φ = 10381464.

The previous prime is 21916459. The next prime is 21916483. The reversal of 21916462 is 26461912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288337 + ... + 288412.

It is an arithmetic number, because the mean of its divisors is an integer number (4325625).

Almost surely, 2^21916462 is an apocalyptic number.

21916462 is a deficient number, since it is larger than the sum of its proper divisors (12688538).

21916462 is a wasteful number, since it uses less digits than its factorization.

21916462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576770.

The product of its digits is 5184, while the sum is 31.

The square root of 21916462 is about 4681.5021093662. The cubic root of 21916462 is about 279.8488214511.

The spelling of 21916462 in words is "twenty-one million, nine hundred sixteen thousand, four hundred sixty-two".