21174698 has 12 divisors (see below), whose sum is σ = 32897670. Its totient is φ = 10221456.

The previous prime is 21174691. The next prime is 21174733. The reversal of 21174698 is 89647112.

It can be written as a sum of positive squares in 3 ways, for example, as 14115049 + 7059649 = 3757^2 + 2657^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21174691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4613 + ... + 7976.

Almost surely, 2^21174698 is an apocalyptic number.

21174698 is a deficient number, since it is larger than the sum of its proper divisors (11722972).

21174698 is a wasteful number, since it uses less digits than its factorization.

21174698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12649 (or 12620 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 21174698 is about 4601.5973313622. The cubic root of 21174698 is about 276.6553512251.

The spelling of 21174698 in words is "twenty-one million, one hundred seventy-four thousand, six hundred ninety-eight".