21104694 has 24 divisors (see below), whose sum is σ = 49244832. Its totient is φ = 6493680.

The previous prime is 21104693. The next prime is 21104711. The reversal of 21104694 is 49640112.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44862 + ... + 45329.

It is an arithmetic number, because the mean of its divisors is an integer number (2051868).

Almost surely, 2^21104694 is an apocalyptic number.

21104694 is an abundant number, since it is smaller than the sum of its proper divisors (28140138).

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

21104694 is a wasteful number, since it uses less digits than its factorization.

21104694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90212 (or 90209 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 21104694 is about 4593.9845450328. The cubic root of 21104694 is about 276.3501384810.

The spelling of 21104694 in words is "twenty-one million, one hundred four thousand, six hundred ninety-four".