20326143 has 16 divisors (see below), whose sum is σ = 29194880. Its totient is φ = 12537504.

The previous prime is 20326099. The next prime is 20326157. The reversal of 20326143 is 34162302.

It is a happy number.

It is not a de Polignac number, because 20326143 - 2⁶ = 20326079 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 (20326183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1696 + ... + 6597.

It is an arithmetic number, because the mean of its divisors is an integer number (1824680).

Almost surely, 2^20326143 is an apocalyptic number.

20326143 is a deficient number, since it is larger than the sum of its proper divisors (8868737).

20326143 is a wasteful number, since it uses less digits than its factorization.

20326143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8358.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20326143 is about 4508.4523952239. The cubic root of 20326143 is about 272.9092937529.

Adding to 20326143 its reverse (34162302), we get a palindrome (54488445).

The spelling of 20326143 in words is "twenty million, three hundred twenty-six thousand, one hundred forty-three".