21266106 has 16 divisors (see below), whose sum is σ = 43999200. Its totient is φ = 6844208.

The previous prime is 21266087. The next prime is 21266117. The reversal of 21266106 is 60166212.

It is a Curzon 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, 60936 + ... + 61283.

It is an arithmetic number, because the mean of its divisors is an integer number (2749950).

Almost surely, 2^21266106 is an apocalyptic number.

21266106 is an abundant number, since it is smaller than the sum of its proper divisors (22733094).

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

21266106 is a wasteful number, since it uses less digits than its factorization.

21266106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122253.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 21266106 is about 4611.5188387342. The cubic root of 21266106 is about 277.0528729978.

The spelling of 21266106 in words is "twenty-one million, two hundred sixty-six thousand, one hundred six".