21614741 has 4 divisors (see below), whose sum is σ = 21647532. Its totient is φ = 21581952.

The previous prime is 21614737. The next prime is 21614759. The reversal of 21614741 is 14741612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2735716 + 18879025 = 1654^2 + 4345^2 .

It is a cyclic number.

It is not a de Polignac number, because 21614741 - 2² = 21614737 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21614741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21614731) by changing a digit.

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, 15386 + ... + 16731.

It is an arithmetic number, because the mean of its divisors is an integer number (5411883).

Almost surely, 2^21614741 is an apocalyptic number.

It is an amenable number.

21614741 is a deficient number, since it is larger than the sum of its proper divisors (32791).

21614741 is an equidigital number, since it uses as much as digits as its factorization.

21614741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32790.

The product of its digits is 1344, while the sum is 26.

The square root of 21614741 is about 4649.1656240663. The cubic root of 21614741 is about 278.5586690001.

The spelling of 21614741 in words is "twenty-one million, six hundred fourteen thousand, seven hundred forty-one".