20323142 has 24 divisors (see below), whose sum is σ = 36689760. Its totient is φ = 8408400.

The previous prime is 20323139. The next prime is 20323151. The reversal of 20323142 is 24132302.

It is a self number, because there is not a number n which added to its sum of digits gives 20323142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 734 + ... + 6417.

It is an arithmetic number, because the mean of its divisors is an integer number (1528740).

Almost surely, 2^20323142 is an apocalyptic number.

20323142 is a deficient number, since it is larger than the sum of its proper divisors (16366618).

20323142 is a wasteful number, since it uses less digits than its factorization.

20323142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7196 (or 7189 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20323142 is about 4508.1195636318. The cubic root of 20323142 is about 272.8958620998.

Adding to 20323142 its reverse (24132302), we get a palindrome (44455444).

The spelling of 20323142 in words is "twenty million, three hundred twenty-three thousand, one hundred forty-two".