18915750820783 has 2 divisors, whose sum is σ = 18915750820784. Its totient is φ = 18915750820782.

The previous prime is 18915750820751. The next prime is 18915750820793. The reversal of 18915750820783 is 38702805751981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18915750820783 - 2⁵ = 18915750820751 is a prime.

It is a super-2 number, since 2×18915750820783² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18915750820793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9457875410391 + 9457875410392.

It is an arithmetic number, because the mean of its divisors is an integer number (9457875410392).

Almost surely, 2^{18915750820783} is an apocalyptic number.

18915750820783 is a deficient number, since it is larger than the sum of its proper divisors (1).

18915750820783 is an equidigital number, since it uses as much as digits as its factorization.

18915750820783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33868800, while the sum is 64.

The spelling of 18915750820783 in words is "eighteen trillion, nine hundred fifteen billion, seven hundred fifty million, eight hundred twenty thousand, seven hundred eighty-three".