21717414 has 24 divisors (see below), whose sum is σ = 47159112. Its totient is φ = 7223040.

The previous prime is 21717407. The next prime is 21717461. The reversal of 21717414 is 41471712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9222 + ... + 11334.

It is an arithmetic number, because the mean of its divisors is an integer number (1964963).

Almost surely, 2^21717414 is an apocalyptic number.

21717414 is an abundant number, since it is smaller than the sum of its proper divisors (25441698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21717414 is a wasteful number, since it uses less digits than its factorization.

21717414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2692 (or 2689 counting only the distinct ones).

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

The square root of 21717414 is about 4660.1946311286. The cubic root of 21717414 is about 278.9990364941. Note that the first 3 decimals are identical.

The spelling of 21717414 in words is "twenty-one million, seven hundred seventeen thousand, four hundred fourteen".