21537314 has 8 divisors (see below), whose sum is σ = 33420060. Its totient is φ = 10397296.

The previous prime is 21537311. The next prime is 21537323. The reversal of 21537314 is 41373512.

It can be written as a sum of positive squares in 2 ways, for example, as 21390625 + 146689 = 4625^2 + 383^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21537311) 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, 185609 + ... + 185724.

Almost surely, 2^21537314 is an apocalyptic number.

21537314 is a deficient number, since it is larger than the sum of its proper divisors (11882746).

21537314 is a wasteful number, since it uses less digits than its factorization.

21537314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371364.

The product of its digits is 2520, while the sum is 26.

The square root of 21537314 is about 4640.8311755547. The cubic root of 21537314 is about 278.2256591253.

The spelling of 21537314 in words is "twenty-one million, five hundred thirty-seven thousand, three hundred fourteen".