21714415 has 16 divisors (see below), whose sum is σ = 28071936. Its totient is φ = 16077600.

The previous prime is 21714403. The next prime is 21714421. The reversal of 21714415 is 51441712.

It is not a de Polignac number, because 21714415 - 2⁵ = 21714383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21714415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520 + ... + 6610.

It is an arithmetic number, because the mean of its divisors is an integer number (1754496).

Almost surely, 2^21714415 is an apocalyptic number.

21714415 is a deficient number, since it is larger than the sum of its proper divisors (6357521).

21714415 is a wasteful number, since it uses less digits than its factorization.

21714415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6150.

The product of its digits is 1120, while the sum is 25.

The square root of 21714415 is about 4659.8728523426. The cubic root of 21714415 is about 278.9861933962.

The spelling of 21714415 in words is "twenty-one million, seven hundred fourteen thousand, four hundred fifteen".