21654614 has 4 divisors (see below), whose sum is σ = 32481924. Its totient is φ = 10827306.

The previous prime is 21654613. The next prime is 21654629. The reversal of 21654614 is 41645612.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21654613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5413652 + ... + 5413655.

It is an arithmetic number, because the mean of its divisors is an integer number (8120481).

Almost surely, 2^21654614 is an apocalyptic number.

21654614 is a deficient number, since it is larger than the sum of its proper divisors (10827310).

21654614 is a wasteful number, since it uses less digits than its factorization.

21654614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10827309.

The product of its digits is 5760, while the sum is 29.

The square root of 21654614 is about 4653.4518370775. The cubic root of 21654614 is about 278.7298507425.

The spelling of 21654614 in words is "twenty-one million, six hundred fifty-four thousand, six hundred fourteen".