21650630 has 8 divisors (see below), whose sum is σ = 38971152. Its totient is φ = 8660248.

The previous prime is 21650627. The next prime is 21650653. The reversal of 21650630 is 3605612.

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

It is a junction number, because it is equal to n+sod(n) for n = 21650596 and 21650605.

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, 1082522 + ... + 1082541.

It is an arithmetic number, because the mean of its divisors is an integer number (4871394).

Almost surely, 2^21650630 is an apocalyptic number.

21650630 is a deficient number, since it is larger than the sum of its proper divisors (17320522).

21650630 is a wasteful number, since it uses less digits than its factorization.

21650630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165070.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 21650630 is about 4653.0237480589. The cubic root of 21650630 is about 278.7127561896.

The spelling of 21650630 in words is "twenty-one million, six hundred fifty thousand, six hundred thirty".