21970322 has 8 divisors (see below), whose sum is σ = 35951472. Its totient is φ = 9986500.

The previous prime is 21970303. The next prime is 21970339. The reversal of 21970322 is 22307912.

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 = 21970291 and 21970300.

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, 499304 + ... + 499347.

It is an arithmetic number, because the mean of its divisors is an integer number (4493934).

Almost surely, 2^21970322 is an apocalyptic number.

21970322 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21970322 is a deficient number, since it is larger than the sum of its proper divisors (13981150).

21970322 is a wasteful number, since it uses less digits than its factorization.

21970322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998664.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 21970322 is about 4687.2510067203. The cubic root of 21970322 is about 280.0778779972.

The spelling of 21970322 in words is "twenty-one million, nine hundred seventy thousand, three hundred twenty-two".