21330722 has 16 divisors (see below), whose sum is σ = 37556160. Its totient is φ = 8894448.

The previous prime is 21330679. The next prime is 21330737. The reversal of 21330722 is 22703312.

It is a junction number, because it is equal to n+sod(n) for n = 21330694 and 21330703.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20072 + ... + 21107.

It is an arithmetic number, because the mean of its divisors is an integer number (2347260).

Almost surely, 2^21330722 is an apocalyptic number.

21330722 is a deficient number, since it is larger than the sum of its proper divisors (16225438).

21330722 is a wasteful number, since it uses less digits than its factorization.

21330722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41225.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 21330722 is about 4618.5194597403. The cubic root of 21330722 is about 277.3331930447. Note that the first 3 decimals are identical.

The spelling of 21330722 in words is "twenty-one million, three hundred thirty thousand, seven hundred twenty-two".