21692474 has 8 divisors (see below), whose sum is σ = 33231168. Its totient is φ = 10615420.

The previous prime is 21692453. The next prime is 21692501. The reversal of 21692474 is 47429612.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115292 + ... + 115479.

It is an arithmetic number, because the mean of its divisors is an integer number (4153896).

Almost surely, 2^21692474 is an apocalyptic number.

21692474 is a deficient number, since it is larger than the sum of its proper divisors (11538694).

21692474 is a wasteful number, since it uses less digits than its factorization.

21692474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230820.

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

The square root of 21692474 is about 4657.5180085535. The cubic root of 21692474 is about 278.8921959459.

The spelling of 21692474 in words is "twenty-one million, six hundred ninety-two thousand, four hundred seventy-four".