21239014 has 8 divisors (see below), whose sum is σ = 31899528. Its totient is φ = 10605840.

The previous prime is 21238981. The next prime is 21239027. The reversal of 21239014 is 41093212.

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

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, 4767 + ... + 8074.

It is an arithmetic number, because the mean of its divisors is an integer number (3987441).

Almost surely, 2^21239014 is an apocalyptic number.

21239014 is a deficient number, since it is larger than the sum of its proper divisors (10660514).

21239014 is a wasteful number, since it uses less digits than its factorization.

21239014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13670.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 21239014 is about 4608.5804755912. The cubic root of 21239014 is about 276.9351723072.

The spelling of 21239014 in words is "twenty-one million, two hundred thirty-nine thousand, fourteen".