21714417 has 24 divisors (see below), whose sum is σ = 32672640. Its totient is φ = 13880160.

The previous prime is 21714403. The next prime is 21714421. The reversal of 21714417 is 71441712.

21714417 is a `hidden beast` number, since 217 + 1 + 441 + 7 = 666.

It is not a de Polignac number, because 21714417 - 2⁴ = 21714401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21714317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70578 + ... + 70884.

It is an arithmetic number, because the mean of its divisors is an integer number (1361360).

Almost surely, 2^21714417 is an apocalyptic number.

It is an amenable number.

21714417 is a deficient number, since it is larger than the sum of its proper divisors (10958223).

21714417 is a wasteful number, since it uses less digits than its factorization.

21714417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 610 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 21714417 is about 4659.8730669408. The cubic root of 21714417 is about 278.9862019615.

The spelling of 21714417 in words is "twenty-one million, seven hundred fourteen thousand, four hundred seventeen".