21714842 has 8 divisors (see below), whose sum is σ = 33186996. Its totient is φ = 10652512.

The previous prime is 21714839. The next prime is 21714851. The reversal of 21714842 is 24841712.

It can be written as a sum of positive squares in 2 ways, for example, as 21353641 + 361201 = 4621^2 + 601^2 .

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

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, 102323 + ... + 102534.

Almost surely, 2^21714842 is an apocalyptic number.

21714842 is a deficient number, since it is larger than the sum of its proper divisors (11472154).

21714842 is a wasteful number, since it uses less digits than its factorization.

21714842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204912.

The product of its digits is 3584, while the sum is 29.

The square root of 21714842 is about 4659.9186688182. The cubic root of 21714842 is about 278.9880220788.

The spelling of 21714842 in words is "twenty-one million, seven hundred fourteen thousand, eight hundred forty-two".