21092994 has 32 divisors (see below), whose sum is σ = 50480640. Its totient is φ = 6489936.

The previous prime is 21092977. The next prime is 21093011. The reversal of 21092994 is 49929012.

It is an interprime number because it is at equal distance from previous prime (21092977) and next prime (21093011).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14322 + ... + 15725.

It is an arithmetic number, because the mean of its divisors is an integer number (1577520).

Almost surely, 2^21092994 is an apocalyptic number.

21092994 is an abundant number, since it is smaller than the sum of its proper divisors (29387646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21092994 is a wasteful number, since it uses less digits than its factorization.

21092994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30071 (or 30065 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 21092994 is about 4592.7109641257. The cubic root of 21092994 is about 276.2990614664.

The spelling of 21092994 in words is "twenty-one million, ninety-two thousand, nine hundred ninety-four".