20023142 has 8 divisors (see below), whose sum is σ = 30846576. Its totient is φ = 9740952.

The previous prime is 20023141. The next prime is 20023147. The reversal of 20023142 is 24132002.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135218 + ... + 135365.

It is an arithmetic number, because the mean of its divisors is an integer number (3855822).

Almost surely, 2^20023142 is an apocalyptic number.

20023142 is a deficient number, since it is larger than the sum of its proper divisors (10823434).

20023142 is a wasteful number, since it uses less digits than its factorization.

20023142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270622.

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

The square root of 20023142 is about 4474.7225612321. The cubic root of 20023142 is about 271.5464163920.

Adding to 20023142 its reverse (24132002), we get a palindrome (44155144).

The spelling of 20023142 in words is "twenty million, twenty-three thousand, one hundred forty-two".