21614474 has 8 divisors (see below), whose sum is σ = 37053408. Its totient is φ = 9263340.

The previous prime is 21614441. The next prime is 21614491. The reversal of 21614474 is 47441612.

It is a happy number.

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771932 + ... + 771959.

It is an arithmetic number, because the mean of its divisors is an integer number (4631676).

Almost surely, 2^21614474 is an apocalyptic number.

21614474 is a deficient number, since it is larger than the sum of its proper divisors (15438934).

21614474 is a wasteful number, since it uses less digits than its factorization.

21614474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543900.

The product of its digits is 5376, while the sum is 29.

The square root of 21614474 is about 4649.1369091478. The cubic root of 21614474 is about 278.5575220133.

The spelling of 21614474 in words is "twenty-one million, six hundred fourteen thousand, four hundred seventy-four".