21730622 has 8 divisors (see below), whose sum is σ = 32618376. Its totient is φ = 10857832.

The previous prime is 21730559. The next prime is 21730637. The reversal of 21730622 is 22603712.

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

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, 1193 + ... + 6699.

It is an arithmetic number, because the mean of its divisors is an integer number (4077297).

Almost surely, 2^21730622 is an apocalyptic number.

21730622 is a deficient number, since it is larger than the sum of its proper divisors (10887754).

21730622 is a wasteful number, since it uses less digits than its factorization.

21730622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7482.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 21730622 is about 4661.6115239260. The cubic root of 21730622 is about 279.0555851618.

The spelling of 21730622 in words is "twenty-one million, seven hundred thirty thousand, six hundred twenty-two".