21699322 has 4 divisors (see below), whose sum is σ = 32548986. Its totient is φ = 10849660.

The previous prime is 21699269. The next prime is 21699343. The reversal of 21699322 is 22399612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15992001 + 5707321 = 3999^2 + 2389^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5424829 + ... + 5424832.

Almost surely, 2^21699322 is an apocalyptic number.

21699322 is a deficient number, since it is larger than the sum of its proper divisors (10849664).

21699322 is a wasteful number, since it uses less digits than its factorization.

21699322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10849663.

The product of its digits is 11664, while the sum is 34.

The square root of 21699322 is about 4658.2531060474. The cubic root of 21699322 is about 278.9215402679.

The spelling of 21699322 in words is "twenty-one million, six hundred ninety-nine thousand, three hundred twenty-two".