20326687 has 8 divisors (see below), whose sum is σ = 21307104. Its totient is φ = 19354368.

The previous prime is 20326681. The next prime is 20326699. The reversal of 20326687 is 78662302.

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

It is a cyclic number.

It is not a de Polignac number, because 20326687 - 2²³ = 11938079 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 (20326681) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3463 + ... + 7255.

It is an arithmetic number, because the mean of its divisors is an integer number (2663388).

Almost surely, 2^20326687 is an apocalyptic number.

20326687 is a deficient number, since it is larger than the sum of its proper divisors (980417).

20326687 is a wasteful number, since it uses less digits than its factorization.

20326687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4049.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 20326687 is about 4508.5127259441. The cubic root of 20326687 is about 272.9117284061.

Adding to 20326687 its reverse (78662302), we get a palindrome (98988989).

The spelling of 20326687 in words is "twenty million, three hundred twenty-six thousand, six hundred eighty-seven".