20013731267643 has 32 divisors (see below), whose sum is σ = 29670173441280. Its totient is φ = 13333398724800.

The previous prime is 20013731267641. The next prime is 20013731267657. The reversal of 20013731267643 is 34676213731002.

20013731267643 is a `hidden beast` number, since 200 + 1 + 37 + 312 + 67 + 6 + 43 = 666.

It is not a de Polignac number, because 20013731267643 - 2¹ = 20013731267641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20013731267641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 577562868 + ... + 577597518.

It is an arithmetic number, because the mean of its divisors is an integer number (927192920040).

Almost surely, 2^{20013731267643} is an apocalyptic number.

20013731267643 is a deficient number, since it is larger than the sum of its proper divisors (9656442173637).

20013731267643 is a wasteful number, since it uses less digits than its factorization.

20013731267643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48616 (or 48610 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 45.

Adding to 20013731267643 its reverse (34676213731002), we get a palindrome (54689944998645).

The spelling of 20013731267643 in words is "twenty trillion, thirteen billion, seven hundred thirty-one million, two hundred sixty-seven thousand, six hundred forty-three".