20350231215413 has 12 divisors (see below), whose sum is σ = 22368590792940. Its totient is φ = 18500082142080.

The previous prime is 20350231215401. The next prime is 20350231215427. The reversal of 20350231215413 is 31451213205302.

It can be written as a sum of positive squares in 2 ways, for example, as 9455729550289 + 10894501665124 = 3075017^2 + 3300682^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20350231215413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20350231215413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20350231515413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19952531 + ... + 20947647.

It is an arithmetic number, because the mean of its divisors is an integer number (1864049232745).

Almost surely, 2^{20350231215413} is an apocalyptic number.

It is an amenable number.

20350231215413 is a deficient number, since it is larger than the sum of its proper divisors (2018359577527).

20350231215413 is a wasteful number, since it uses less digits than its factorization.

20350231215413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164148 (or 1164137 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 20350231215413 in words is "twenty trillion, three hundred fifty billion, two hundred thirty-one million, two hundred fifteen thousand, four hundred thirteen".