21814370 has 16 divisors (see below), whose sum is σ = 39648960. Its totient is φ = 8640624.

The previous prime is 21814369. The next prime is 21814379. The reversal of 21814370 is 7341812.

It is not an unprimeable number, because it can be changed into a prime (21814379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9560 + ... + 11619.

It is an arithmetic number, because the mean of its divisors is an integer number (2478060).

Almost surely, 2^21814370 is an apocalyptic number.

21814370 is a deficient number, since it is larger than the sum of its proper divisors (17834590).

21814370 is a wasteful number, since it uses less digits than its factorization.

21814370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21289.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 21814370 is about 4670.5856163869. The cubic root of 21814370 is about 279.4136112506.

The spelling of 21814370 in words is "twenty-one million, eight hundred fourteen thousand, three hundred seventy".