21734794 has 4 divisors (see below), whose sum is σ = 32602194. Its totient is φ = 10867396.

The previous prime is 21734777. The next prime is 21734827. The reversal of 21734794 is 49743712.

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., 16916769 + 4818025 = 4113^2 + 2195^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5433697 + ... + 5433700.

Almost surely, 2^21734794 is an apocalyptic number.

21734794 is a deficient number, since it is larger than the sum of its proper divisors (10867400).

21734794 is a wasteful number, since it uses less digits than its factorization.

21734794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10867399.

The product of its digits is 42336, while the sum is 37.

The square root of 21734794 is about 4662.0589871858. The cubic root of 21734794 is about 279.0734423804.

The spelling of 21734794 in words is "twenty-one million, seven hundred thirty-four thousand, seven hundred ninety-four".