20312541141643 has 4 divisors (see below), whose sum is σ = 20807968974408. Its totient is φ = 19817113308880.

The previous prime is 20312541141569. The next prime is 20312541141649. The reversal of 20312541141643 is 34614114521302.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20312541141643 - 2²⁹ = 20312004270731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312541141649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247713916321 + ... + 247713916402.

It is an arithmetic number, because the mean of its divisors is an integer number (5201992243602).

Almost surely, 2^{20312541141643} is an apocalyptic number.

20312541141643 is a deficient number, since it is larger than the sum of its proper divisors (495427832765).

20312541141643 is an equidigital number, since it uses as much as digits as its factorization.

20312541141643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495427832764.

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 20312541141643 its reverse (34614114521302), we get a palindrome (54926655662945).

The spelling of 20312541141643 in words is "twenty trillion, three hundred twelve billion, five hundred forty-one million, one hundred forty-one thousand, six hundred forty-three".