21614087 has 4 divisors (see below), whose sum is σ = 23579016. Its totient is φ = 19649160.

The previous prime is 21614057. The next prime is 21614141. The reversal of 21614087 is 78041612.

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

It is a cyclic number.

It is not a de Polignac number, because 21614087 - 2⁶ = 21614023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21614017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982448 + ... + 982469.

It is an arithmetic number, because the mean of its divisors is an integer number (5894754).

Almost surely, 2^21614087 is an apocalyptic number.

21614087 is a deficient number, since it is larger than the sum of its proper divisors (1964929).

21614087 is a wasteful number, since it uses less digits than its factorization.

21614087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964928.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 21614087 is about 4649.0952883330. The cubic root of 21614087 is about 278.5558595100. Note that the first 3 decimals are identical.

Adding to 21614087 its reverse (78041612), we get a palindrome (99655699).

The spelling of 21614087 in words is "twenty-one million, six hundred fourteen thousand, eighty-seven".