21443614 has 4 divisors (see below), whose sum is σ = 32165424. Its totient is φ = 10721806.

The previous prime is 21443593. The next prime is 21443621. The reversal of 21443614 is 41634412.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5360902 + ... + 5360905.

It is an arithmetic number, because the mean of its divisors is an integer number (8041356).

Almost surely, 2^21443614 is an apocalyptic number.

21443614 is a deficient number, since it is larger than the sum of its proper divisors (10721810).

21443614 is a wasteful number, since it uses less digits than its factorization.

21443614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10721809.

The product of its digits is 2304, while the sum is 25.

The square root of 21443614 is about 4630.7249972332. The cubic root of 21443614 is about 277.8215907543.

The spelling of 21443614 in words is "twenty-one million, four hundred forty-three thousand, six hundred fourteen".