20131340234 has 32 divisors (see below), whose sum is σ = 31658256000. Its totient is φ = 9588801600.

The previous prime is 20131340233. The next prime is 20131340261. The reversal of 20131340234 is 43204313102.

It is not an unprimeable number, because it can be changed into a prime (20131340233) 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, 1297229 + ... + 1312655.

It is an arithmetic number, because the mean of its divisors is an integer number (989320500).

Almost surely, 2^20131340234 is an apocalyptic number.

20131340234 is a deficient number, since it is larger than the sum of its proper divisors (11526915766).

20131340234 is a wasteful number, since it uses less digits than its factorization.

20131340234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15758.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20131340234 its reverse (43204313102), we get a palindrome (63335653336).

The spelling of 20131340234 in words is "twenty billion, one hundred thirty-one million, three hundred forty thousand, two hundred thirty-four".