21614774 has 8 divisors (see below), whose sum is σ = 32452920. Its totient is φ = 10797136.

The previous prime is 21614759. The next prime is 21614797. The reversal of 21614774 is 47741612.

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

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 21614774.

It is a congruent number.

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, 2144 + ... + 6915.

It is an arithmetic number, because the mean of its divisors is an integer number (4056615).

Almost surely, 2^21614774 is an apocalyptic number.

21614774 is a deficient number, since it is larger than the sum of its proper divisors (10838146).

21614774 is a wasteful number, since it uses less digits than its factorization.

21614774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10254.

The product of its digits is 9408, while the sum is 32.

The square root of 21614774 is about 4649.1691730889. The cubic root of 21614774 is about 278.5588107619.

The spelling of 21614774 in words is "twenty-one million, six hundred fourteen thousand, seven hundred seventy-four".