21384322 has 4 divisors (see below), whose sum is σ = 32076486. Its totient is φ = 10692160.

The previous prime is 21384313. The next prime is 21384347. The reversal of 21384322 is 22348312.

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., 14356521 + 7027801 = 3789^2 + 2651^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5346079 + ... + 5346082.

Almost surely, 2^21384322 is an apocalyptic number.

21384322 is a deficient number, since it is larger than the sum of its proper divisors (10692164).

21384322 is a wasteful number, since it uses less digits than its factorization.

21384322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10692163.

The product of its digits is 2304, while the sum is 25.

The square root of 21384322 is about 4624.3185443912. The cubic root of 21384322 is about 277.5652937285.

The spelling of 21384322 in words is "twenty-one million, three hundred eighty-four thousand, three hundred twenty-two".