21498896 has 10 divisors (see below), whose sum is σ = 41654142. Its totient is φ = 10749440.

The previous prime is 21498857. The next prime is 21498907. The reversal of 21498896 is 69889412.

It can be written as a sum of positive squares in only one way, i.e., 21492496 + 6400 = 4636^2 + 80^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21498896.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671825 + ... + 671856.

Almost surely, 2^21498896 is an apocalyptic number.

It is an amenable number.

21498896 is a deficient number, since it is larger than the sum of its proper divisors (20155246).

21498896 is a wasteful number, since it uses less digits than its factorization.

21498896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343689 (or 1343683 counting only the distinct ones).

The product of its digits is 248832, while the sum is 47.

The square root of 21498896 is about 4636.6901988380. The cubic root of 21498896 is about 278.0601288084.

The spelling of 21498896 in words is "twenty-one million, four hundred ninety-eight thousand, eight hundred ninety-six".