20243255142 has 32 divisors (see below), whose sum is σ = 44172221184. Its totient is φ = 6133608800.

The previous prime is 20243255141. The next prime is 20243255159. The reversal of 20243255142 is 24155234202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243255141) 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, 962503 + ... + 983309.

It is an arithmetic number, because the mean of its divisors is an integer number (1380381912).

Almost surely, 2^20243255142 is an apocalyptic number.

20243255142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20243255142 is an abundant number, since it is smaller than the sum of its proper divisors (23928966042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20243255142 is a wasteful number, since it uses less digits than its factorization.

20243255142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35564.

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 20243255142 its reverse (24155234202), we get a palindrome (44398489344).

The spelling of 20243255142 in words is "twenty billion, two hundred forty-three million, two hundred fifty-five thousand, one hundred forty-two".