21696898 has 16 divisors (see below), whose sum is σ = 34416000. Its totient is φ = 10230192.

The previous prime is 21696877. The next prime is 21696923. The reversal of 21696898 is 89869612.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7888 + ... + 10276.

It is an arithmetic number, because the mean of its divisors is an integer number (2151000).

Almost surely, 2^21696898 is an apocalyptic number.

21696898 is a deficient number, since it is larger than the sum of its proper divisors (12719102).

21696898 is a wasteful number, since it uses less digits than its factorization.

21696898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2649.

The product of its digits is 373248, while the sum is 49.

The square root of 21696898 is about 4657.9929154090. The cubic root of 21696898 is about 278.9111539066.

The spelling of 21696898 in words is "twenty-one million, six hundred ninety-six thousand, eight hundred ninety-eight".