21057614 has 8 divisors (see below), whose sum is σ = 31615920. Its totient is φ = 10518976.

The previous prime is 21057599. The next prime is 21057623. The reversal of 21057614 is 41675012.

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, 1859 + ... + 6750.

It is an arithmetic number, because the mean of its divisors is an integer number (3951990).

Almost surely, 2^21057614 is an apocalyptic number.

21057614 is a deficient number, since it is larger than the sum of its proper divisors (10558306).

21057614 is a wasteful number, since it uses less digits than its factorization.

21057614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9834.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 21057614 is about 4588.8575920375. The cubic root of 21057614 is about 276.1444930590.

The spelling of 21057614 in words is "twenty-one million, fifty-seven thousand, six hundred fourteen".