21734338 has 4 divisors (see below), whose sum is σ = 32601510. Its totient is φ = 10867168.

The previous prime is 21734329. The next prime is 21734357. The reversal of 21734338 is 83343712.

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., 17081689 + 4652649 = 4133^2 + 2157^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5433583 + ... + 5433586.

Almost surely, 2^21734338 is an apocalyptic number.

21734338 is a deficient number, since it is larger than the sum of its proper divisors (10867172).

21734338 is a wasteful number, since it uses less digits than its factorization.

21734338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10867171.

The product of its digits is 12096, while the sum is 31.

The square root of 21734338 is about 4662.0100814992. The cubic root of 21734338 is about 279.0714906960.

The spelling of 21734338 in words is "twenty-one million, seven hundred thirty-four thousand, three hundred thirty-eight".