21443714 has 16 divisors (see below), whose sum is σ = 32901120. Its totient is φ = 10479600.

The previous prime is 21443711. The next prime is 21443717. The reversal of 21443714 is 41734412.

It is an interprime number because it is at equal distance from previous prime (21443711) and next prime (21443717).

It is a super-2 number, since 2×21443714² = 919665740227592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21443711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16127 + ... + 17405.

It is an arithmetic number, because the mean of its divisors is an integer number (2056320).

Almost surely, 2^21443714 is an apocalyptic number.

21443714 is a deficient number, since it is larger than the sum of its proper divisors (11457406).

21443714 is a wasteful number, since it uses less digits than its factorization.

21443714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465.

The product of its digits is 2688, while the sum is 26.

The square root of 21443714 is about 4630.7357946659. The cubic root of 21443714 is about 277.8220226174.

The spelling of 21443714 in words is "twenty-one million, four hundred forty-three thousand, seven hundred fourteen".