20113031013442 has 4 divisors (see below), whose sum is σ = 30169546520166. Its totient is φ = 10056515506720.

The previous prime is 20113031013433. The next prime is 20113031013487. The reversal of 20113031013442 is 24431013031102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15958115447121 + 4154915566321 = 3994761^2 + 2038361^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5028257753359 + ... + 5028257753362.

Almost surely, 2^{20113031013442} is an apocalyptic number.

20113031013442 is a deficient number, since it is larger than the sum of its proper divisors (10056515506724).

20113031013442 is a wasteful number, since it uses less digits than its factorization.

20113031013442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10056515506723.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 20113031013442 its reverse (24431013031102), we get a palindrome (44544044044544).

The spelling of 20113031013442 in words is "twenty trillion, one hundred thirteen billion, thirty-one million, thirteen thousand, four hundred forty-two".