20315120132443 has 2 divisors, whose sum is σ = 20315120132444. Its totient is φ = 20315120132442.

The previous prime is 20315120132431. The next prime is 20315120132473. The reversal of 20315120132443 is 34423102151302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20315120132443 is a prime.

It is a super-2 number, since 2×20315120132443² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20315120132473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157560066221 + 10157560066222.

It is an arithmetic number, because the mean of its divisors is an integer number (10157560066222).

Almost surely, 2^{20315120132443} is an apocalyptic number.

20315120132443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315120132443 is an equidigital number, since it uses as much as digits as its factorization.

20315120132443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 20315120132443 its reverse (34423102151302), we get a palindrome (54738222283745).

The spelling of 20315120132443 in words is "twenty trillion, three hundred fifteen billion, one hundred twenty million, one hundred thirty-two thousand, four hundred forty-three".