21865314 has 16 divisors (see below), whose sum is σ = 46032480. Its totient is φ = 6904800.

The previous prime is 21865289. The next prime is 21865331. The reversal of 21865314 is 41356812.

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, 95787 + ... + 96014.

It is an arithmetic number, because the mean of its divisors is an integer number (2877030).

Almost surely, 2^21865314 is an apocalyptic number.

21865314 is an abundant number, since it is smaller than the sum of its proper divisors (24167166).

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

21865314 is a wasteful number, since it uses less digits than its factorization.

21865314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191825.

The product of its digits is 5760, while the sum is 30.

The square root of 21865314 is about 4676.0361418620. The cubic root of 21865314 is about 279.6309508697.

The spelling of 21865314 in words is "twenty-one million, eight hundred sixty-five thousand, three hundred fourteen".