21156110 has 16 divisors (see below), whose sum is σ = 38892096. Its totient is φ = 8282208.

The previous prime is 21156077. The next prime is 21156127. The reversal of 21156110 is 1165112.

It is a congruent 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, 22037 + ... + 22976.

It is an arithmetic number, because the mean of its divisors is an integer number (2430756).

Almost surely, 2^21156110 is an apocalyptic number.

21156110 is a deficient number, since it is larger than the sum of its proper divisors (17735986).

21156110 is a wasteful number, since it uses less digits than its factorization.

21156110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45067.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 21156110 is about 4599.5771544784. The cubic root of 21156110 is about 276.5743744675.

The spelling of 21156110 in words is "twenty-one million, one hundred fifty-six thousand, one hundred ten".