21106914 has 16 divisors (see below), whose sum is σ = 42402528. Its totient is φ = 7004192.

The previous prime is 21106907. The next prime is 21106933. The reversal of 21106914 is 41960112.

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, 6387 + ... + 9110.

It is an arithmetic number, because the mean of its divisors is an integer number (2650158).

Almost surely, 2^21106914 is an apocalyptic number.

21106914 is an abundant number, since it is smaller than the sum of its proper divisors (21295614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21106914 is a wasteful number, since it uses less digits than its factorization.

21106914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15729.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 21106914 is about 4594.2261589957. The cubic root of 21106914 is about 276.3598278863.

The spelling of 21106914 in words is "twenty-one million, one hundred six thousand, nine hundred fourteen".