20312312142 has 32 divisors (see below), whose sum is σ = 41038912512. Its totient is φ = 6701786784.

The previous prime is 20312312117. The next prime is 20312312149. The reversal of 20312312142 is 24121321302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312312149) 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, 1499323 + ... + 1512809.

It is an arithmetic number, because the mean of its divisors is an integer number (1282466016).

Almost surely, 2^20312312142 is an apocalyptic number.

20312312142 is an abundant number, since it is smaller than the sum of its proper divisors (20726600370).

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

20312312142 is a wasteful number, since it uses less digits than its factorization.

20312312142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16032.

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

Adding to 20312312142 its reverse (24121321302), we get a palindrome (44433633444).

The spelling of 20312312142 in words is "twenty billion, three hundred twelve million, three hundred twelve thousand, one hundred forty-two".