20431201142 has 12 divisors (see below), whose sum is σ = 33686154348. Its totient is φ = 9286909500.

The previous prime is 20431201127. The next prime is 20431201183. The reversal of 20431201142 is 24110213402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42212984 + ... + 42213467.

It is an arithmetic number, because the mean of its divisors is an integer number (2807179529).

Almost surely, 2^20431201142 is an apocalyptic number.

20431201142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20431201142 is a deficient number, since it is larger than the sum of its proper divisors (13254953206).

20431201142 is a wasteful number, since it uses less digits than its factorization.

20431201142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84426475 (or 84426464 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20431201142 its reverse (24110213402), we get a palindrome (44541414544).

The spelling of 20431201142 in words is "twenty billion, four hundred thirty-one million, two hundred one thousand, one hundred forty-two".