20113031013445 has 16 divisors (see below), whose sum is σ = 25406418090240. Its totient is φ = 15243269840064.

The previous prime is 20113031013433. The next prime is 20113031013487. The reversal of 20113031013445 is 54431013031102.

It is a cyclic number.

It is not a de Polignac number, because 20113031013445 - 2³¹ = 20110883529797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3060612 + ... + 7042258.

It is an arithmetic number, because the mean of its divisors is an integer number (1587901130640).

Almost surely, 2^{20113031013445} is an apocalyptic number.

It is an amenable number.

20113031013445 is a deficient number, since it is larger than the sum of its proper divisors (5293387076795).

20113031013445 is a wasteful number, since it uses less digits than its factorization.

20113031013445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034844.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 20113031013445 its reverse (54431013031102), we get a palindrome (74544044044547).

The spelling of 20113031013445 in words is "twenty trillion, one hundred thirteen billion, thirty-one million, thirteen thousand, four hundred forty-five".