20415502320443 has 2 divisors, whose sum is σ = 20415502320444. Its totient is φ = 20415502320442.

The previous prime is 20415502320427. The next prime is 20415502320457. The reversal of 20415502320443 is 34402320551402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20415502320443 - 2⁴ = 20415502320427 is a prime.

It is not a weakly prime, because it can be changed into another prime (20415502350443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10207751160221 + 10207751160222.

It is an arithmetic number, because the mean of its divisors is an integer number (10207751160222).

Almost surely, 2^{20415502320443} is an apocalyptic number.

20415502320443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20415502320443 is an equidigital number, since it uses as much as digits as its factorization.

20415502320443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 20415502320443 its reverse (34402320551402), we get a palindrome (54817822871845).

The spelling of 20415502320443 in words is "twenty trillion, four hundred fifteen billion, five hundred two million, three hundred twenty thousand, four hundred forty-three".