21457614 has 8 divisors (see below), whose sum is σ = 42915240. Its totient is φ = 7152536.

The previous prime is 21457603. The next prime is 21457627. The reversal of 21457614 is 41675412.

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

21457614 is an admirable number.

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, 1788129 + ... + 1788140.

It is an arithmetic number, because the mean of its divisors is an integer number (5364405).

Almost surely, 2^21457614 is an apocalyptic number.

21457614 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21457614 is a wasteful number, since it uses less digits than its factorization.

21457614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576274.

The product of its digits is 6720, while the sum is 30.

The square root of 21457614 is about 4632.2363929316. The cubic root of 21457614 is about 277.8820385272.

The spelling of 21457614 in words is "twenty-one million, four hundred fifty-seven thousand, six hundred fourteen".