21314288 has 20 divisors (see below), whose sum is σ = 41386488. Its totient is φ = 10633920.

The previous prime is 21314287. The next prime is 21314291. The reversal of 21314288 is 88241312.

It is a self number, because there is not a number n which added to its sum of digits gives 21314288.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7970 + ... + 10302.

Almost surely, 2^21314288 is an apocalyptic number.

It is an amenable number.

21314288 is a deficient number, since it is larger than the sum of its proper divisors (20072200).

21314288 is a wasteful number, since it uses less digits than its factorization.

21314288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2912 (or 2906 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 21314288 is about 4616.7399753506. The cubic root of 21314288 is about 277.2619520639.

The spelling of 21314288 in words is "twenty-one million, three hundred fourteen thousand, two hundred eighty-eight".