21734674 has 16 divisors (see below), whose sum is σ = 35967960. Its totient is φ = 9786240.

The previous prime is 21734621. The next prime is 21734681. The reversal of 21734674 is 47643712.

It can be written as a sum of positive squares in 4 ways, for example, as 15155449 + 6579225 = 3893^2 + 2565^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9129 + ... + 11260.

Almost surely, 2^21734674 is an apocalyptic number.

21734674 is a deficient number, since it is larger than the sum of its proper divisors (14233286).

21734674 is a wasteful number, since it uses less digits than its factorization.

21734674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20445.

The product of its digits is 28224, while the sum is 34.

The square root of 21734674 is about 4662.0461173180. The cubic root of 21734674 is about 279.0729287819.

The spelling of 21734674 in words is "twenty-one million, seven hundred thirty-four thousand, six hundred seventy-four".