20326986 has 48 divisors (see below), whose sum is σ = 47234304. Its totient is φ = 6301152.

The previous prime is 20326973. The next prime is 20326987. The reversal of 20326986 is 68962302.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20326986.

It is not an unprimeable number, because it can be changed into a prime (20326987) 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 23 ways as a sum of consecutive naturals, for example, 14655 + ... + 15981.

It is an arithmetic number, because the mean of its divisors is an integer number (984048).

Almost surely, 2^20326986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20326986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23617152).

20326986 is an abundant number, since it is smaller than the sum of its proper divisors (26907318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20326986 is a wasteful number, since it uses less digits than its factorization.

20326986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395 (or 1392 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 20326986 is about 4508.5458853160. The cubic root of 20326986 is about 272.9130665518.

It can be divided in two parts, 20326 and 986, that added together give a palindrome (21312).

The spelling of 20326986 in words is "twenty million, three hundred twenty-six thousand, nine hundred eighty-six".