21693484 has 6 divisors (see below), whose sum is σ = 37963604. Its totient is φ = 10846740.

The previous prime is 21693437. The next prime is 21693493. The reversal of 21693484 is 48439612.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2711682 + ... + 2711689.

Almost surely, 2^21693484 is an apocalyptic number.

It is an amenable number.

21693484 is a deficient number, since it is larger than the sum of its proper divisors (16270120).

21693484 is a wasteful number, since it uses less digits than its factorization.

21693484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5423375 (or 5423373 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 21693484 is about 4657.6264341400. The cubic root of 21693484 is about 278.8965242788.

The spelling of 21693484 in words is "twenty-one million, six hundred ninety-three thousand, four hundred eighty-four".