20031142 has 8 divisors (see below), whose sum is σ = 30066336. Its totient is φ = 10009032.

The previous prime is 20031139. The next prime is 20031169. The reversal of 20031142 is 24113002.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2848 + ... + 6940.

It is an arithmetic number, because the mean of its divisors is an integer number (3758292).

Almost surely, 2^20031142 is an apocalyptic number.

20031142 is a deficient number, since it is larger than the sum of its proper divisors (10035194).

20031142 is a wasteful number, since it uses less digits than its factorization.

20031142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6542.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20031142 is about 4475.6163821311. The cubic root of 20031142 is about 271.5825759198.

Adding to 20031142 its reverse (24113002), we get a palindrome (44144144).

The spelling of 20031142 in words is "twenty million, thirty-one thousand, one hundred forty-two".