20201131142 has 4 divisors (see below), whose sum is σ = 30301696716. Its totient is φ = 10100565570.

The previous prime is 20201131133. The next prime is 20201131177. The reversal of 20201131142 is 24113110202.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20201131142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050282784 + ... + 5050282787.

It is an arithmetic number, because the mean of its divisors is an integer number (7575424179).

Almost surely, 2^20201131142 is an apocalyptic number.

20201131142 is a deficient number, since it is larger than the sum of its proper divisors (10100565574).

20201131142 is a wasteful number, since it uses less digits than its factorization.

20201131142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100565573.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20201131142 its reverse (24113110202), we get a palindrome (44314241344).

The spelling of 20201131142 in words is "twenty billion, two hundred one million, one hundred thirty-one thousand, one hundred forty-two".