20430311142 has 16 divisors (see below), whose sum is σ = 41011402752. Its totient is φ = 6784973640.

The previous prime is 20430311117. The next prime is 20430311159. The reversal of 20430311142 is 24111303402.

It is a super-2 number, since 2×20430311142² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6280758 + ... + 6284009.

It is an arithmetic number, because the mean of its divisors is an integer number (2563212672).

Almost surely, 2^20430311142 is an apocalyptic number.

20430311142 is an abundant number, since it is smaller than the sum of its proper divisors (20581091610).

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

20430311142 is a wasteful number, since it uses less digits than its factorization.

20430311142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12565043.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20430311142 its reverse (24111303402), we get a palindrome (44541614544).

The spelling of 20430311142 in words is "twenty billion, four hundred thirty million, three hundred eleven thousand, one hundred forty-two".