21092384 has 12 divisors (see below), whose sum is σ = 41525694. Its totient is φ = 10546176.

The previous prime is 21092371. The next prime is 21092399. The reversal of 21092384 is 48329012.

It can be written as a sum of positive squares in only one way, i.e., 14227984 + 6864400 = 3772^2 + 2620^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329537 + ... + 329600.

Almost surely, 2^21092384 is an apocalyptic number.

It is an amenable number.

21092384 is a deficient number, since it is larger than the sum of its proper divisors (20433310).

21092384 is an equidigital number, since it uses as much as digits as its factorization.

21092384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659147 (or 659139 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 21092384 is about 4592.6445540669. The cubic root of 21092384 is about 276.2963979587.

The spelling of 21092384 in words is "twenty-one million, ninety-two thousand, three hundred eighty-four".