21736322 has 4 divisors (see below), whose sum is σ = 32604486. Its totient is φ = 10868160.

The previous prime is 21736303. The next prime is 21736339. The reversal of 21736322 is 22363712.

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., 13845841 + 7890481 = 3721^2 + 2809^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21736291 and 21736300.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5434079 + ... + 5434082.

Almost surely, 2^21736322 is an apocalyptic number.

21736322 is a deficient number, since it is larger than the sum of its proper divisors (10868164).

21736322 is a wasteful number, since it uses less digits than its factorization.

21736322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10868163.

The product of its digits is 3024, while the sum is 26.

The square root of 21736322 is about 4662.2228603961. Note that the first 3 decimals coincide. The cubic root of 21736322 is about 279.0799820364.

The spelling of 21736322 in words is "twenty-one million, seven hundred thirty-six thousand, three hundred twenty-two".