21093292 has 24 divisors (see below), whose sum is σ = 40395600. Its totient is φ = 9557760.

The previous prime is 21093283. The next prime is 21093301. The reversal of 21093292 is 29239012.

It is an interprime number because it is at equal distance from previous prime (21093283) and next prime (21093301).

It is a self number, because there is not a number n which added to its sum of digits gives 21093292.

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 7 ways as a sum of consecutive naturals, for example, 19584 + ... + 20632.

It is an arithmetic number, because the mean of its divisors is an integer number (1683150).

Almost surely, 2^21093292 is an apocalyptic number.

21093292 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21093292 is a deficient number, since it is larger than the sum of its proper divisors (19302308).

21093292 is a wasteful number, since it uses less digits than its factorization.

21093292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521 (or 1519 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 21093292 is about 4592.7434067233. The cubic root of 21093292 is about 276.3003626367.

The spelling of 21093292 in words is "twenty-one million, ninety-three thousand, two hundred ninety-two".