21722414 has 8 divisors (see below), whose sum is σ = 37238448. Its totient is φ = 9309600.

The previous prime is 21722387. The next prime is 21722423. The reversal of 21722414 is 41422712.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21722414.

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, 775787 + ... + 775814.

It is an arithmetic number, because the mean of its divisors is an integer number (4654806).

Almost surely, 2^21722414 is an apocalyptic number.

21722414 is a deficient number, since it is larger than the sum of its proper divisors (15516034).

21722414 is a wasteful number, since it uses less digits than its factorization.

21722414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551610.

The product of its digits is 896, while the sum is 23.

The square root of 21722414 is about 4660.7310585358. The cubic root of 21722414 is about 279.0204461663.

The spelling of 21722414 in words is "twenty-one million, seven hundred twenty-two thousand, four hundred fourteen".