21290296 has 16 divisors (see below), whose sum is σ = 39988440. Its totient is φ = 10626720.

The previous prime is 21290219. The next prime is 21290303. The reversal of 21290296 is 69209212.

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, 3451 + ... + 7381.

Almost surely, 2^21290296 is an apocalyptic number.

It is an amenable number.

21290296 is a deficient number, since it is larger than the sum of its proper divisors (18698144).

21290296 is a wasteful number, since it uses less digits than its factorization.

21290296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4614 (or 4610 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 21290296 is about 4614.1408734455. The cubic root of 21290296 is about 277.1578815575.

The spelling of 21290296 in words is "twenty-one million, two hundred ninety thousand, two hundred ninety-six".