21100692 has 12 divisors (see below), whose sum is σ = 49234976. Its totient is φ = 7033560.

The previous prime is 21100687. The next prime is 21100711. The reversal of 21100692 is 29600112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 879184 + ... + 879207.

Almost surely, 2^21100692 is an apocalyptic number.

It is an amenable number.

21100692 is an abundant number, since it is smaller than the sum of its proper divisors (28134284).

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

21100692 is a wasteful number, since it uses less digits than its factorization.

21100692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758398 (or 1758396 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 21100692 is about 4593.5489547843. The cubic root of 21100692 is about 276.3326696474.

The spelling of 21100692 in words is "twenty-one million, one hundred thousand, six hundred ninety-two".