21614872 has 16 divisors (see below), whose sum is σ = 41517000. Its totient is φ = 10543680.

The previous prime is 21614867. The next prime is 21614881. The reversal of 21614872 is 27841612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32622 + ... + 33277.

Almost surely, 2^21614872 is an apocalyptic number.

It is an amenable number.

21614872 is a deficient number, since it is larger than the sum of its proper divisors (19902128).

21614872 is a wasteful number, since it uses less digits than its factorization.

21614872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65946 (or 65942 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 21614872 is about 4649.1797125945. The cubic root of 21614872 is about 278.5592317505.

The spelling of 21614872 in words is "twenty-one million, six hundred fourteen thousand, eight hundred seventy-two".