21060868 has 12 divisors (see below), whose sum is σ = 36970192. Its totient is φ = 10497960.

The previous prime is 21060829. The next prime is 21060869. The reversal of 21060868 is 86806012.

It is a hoax number, since the sum of its digits (31) 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 (21060869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6630 + ... + 9277.

Almost surely, 2^21060868 is an apocalyptic number.

It is an amenable number.

21060868 is a deficient number, since it is larger than the sum of its proper divisors (15909324).

21060868 is a wasteful number, since it uses less digits than its factorization.

21060868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16242 (or 16240 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 21060868 is about 4589.2121328176. The cubic root of 21060868 is about 276.1587163846.

The spelling of 21060868 in words is "twenty-one million, sixty thousand, eight hundred sixty-eight".