20320142 has 8 divisors (see below), whose sum is σ = 30794736. Its totient is φ = 10055232.

The previous prime is 20320103. The next prime is 20320171. The reversal of 20320142 is 24102302.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 52178 + ... + 52565.

It is an arithmetic number, because the mean of its divisors is an integer number (3849342).

Almost surely, 2^20320142 is an apocalyptic number.

20320142 is a deficient number, since it is larger than the sum of its proper divisors (10474594).

20320142 is a wasteful number, since it uses less digits than its factorization.

20320142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104842.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20320142 is about 4507.7868183844. The cubic root of 20320142 is about 272.8824336009.

Adding to 20320142 its reverse (24102302), we get a palindrome (44422444).

The spelling of 20320142 in words is "twenty million, three hundred twenty thousand, one hundred forty-two".