21339514 has 16 divisors (see below), whose sum is σ = 36698688. Its totient is φ = 9116352.

The previous prime is 21339511. The next prime is 21339529. The reversal of 21339514 is 41593312.

It is not an unprimeable number, because it can be changed into a prime (21339511) 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, 2457 + ... + 6979.

It is an arithmetic number, because the mean of its divisors is an integer number (2293668).

Almost surely, 2^21339514 is an apocalyptic number.

21339514 is a deficient number, since it is larger than the sum of its proper divisors (15359174).

21339514 is a wasteful number, since it uses less digits than its factorization.

21339514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4869.

The product of its digits is 3240, while the sum is 28.

The square root of 21339514 is about 4619.4711818562. The cubic root of 21339514 is about 277.3712911223.

The spelling of 21339514 in words is "twenty-one million, three hundred thirty-nine thousand, five hundred fourteen".