21514630 has 8 divisors (see below), whose sum is σ = 38726352. Its totient is φ = 8605848.

The previous prime is 21514613. The next prime is 21514643. The reversal of 21514630 is 3641512.

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

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, 1075722 + ... + 1075741.

It is an arithmetic number, because the mean of its divisors is an integer number (4840794).

Almost surely, 2^21514630 is an apocalyptic number.

21514630 is a deficient number, since it is larger than the sum of its proper divisors (17211722).

21514630 is a wasteful number, since it uses less digits than its factorization.

21514630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151470.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 21514630 is about 4638.3865729368. The cubic root of 21514630 is about 278.1279451778.

The spelling of 21514630 in words is "twenty-one million, five hundred fourteen thousand, six hundred thirty".