21924674 has 8 divisors (see below), whose sum is σ = 33337740. Its totient is φ = 10812096.

The previous prime is 21924653. The next prime is 21924697. The reversal of 21924674 is 47642912.

It can be written as a sum of positive squares in 2 ways, for example, as 18983449 + 2941225 = 4357^2 + 1715^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 74939 + ... + 75230.

Almost surely, 2^21924674 is an apocalyptic number.

21924674 is a deficient number, since it is larger than the sum of its proper divisors (11413066).

21924674 is a wasteful number, since it uses less digits than its factorization.

21924674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150244.

The product of its digits is 24192, while the sum is 35.

The square root of 21924674 is about 4682.3790961433. The cubic root of 21924674 is about 279.8837697858.

The spelling of 21924674 in words is "twenty-one million, nine hundred twenty-four thousand, six hundred seventy-four".