20131544234 has 16 divisors (see below), whose sum is σ = 30980718216. Its totient is φ = 9805382400.

The previous prime is 20131544231. The next prime is 20131544239. The reversal of 20131544234 is 43244513102.

It can be written as a sum of positive squares in 4 ways, for example, as 16608765625 + 3522778609 = 128875^2 + 59353^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20131544197 and 20131544206.

It is not an unprimeable number, because it can be changed into a prime (20131544231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131507 + ... + 239910.

Almost surely, 2^20131544234 is an apocalyptic number.

20131544234 is a deficient number, since it is larger than the sum of its proper divisors (10849173982).

20131544234 is a wasteful number, since it uses less digits than its factorization.

20131544234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372121.

The product of its (nonzero) digits is 11520, while the sum is 29.

The spelling of 20131544234 in words is "twenty billion, one hundred thirty-one million, five hundred forty-four thousand, two hundred thirty-four".