1994920230817 has 2 divisors, whose sum is σ = 1994920230818. Its totient is φ = 1994920230816.

The previous prime is 1994920230803. The next prime is 1994920230827. The reversal of 1994920230817 is 7180320294991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1987651645281 + 7268585536 = 1409841^2 + 85256^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994920230817 - 2¹⁹ = 1994919706529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1994920230827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997460115408 + 997460115409.

It is an arithmetic number, because the mean of its divisors is an integer number (997460115409).

Almost surely, 2^{1994920230817} is an apocalyptic number.

It is an amenable number.

1994920230817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994920230817 is an equidigital number, since it uses as much as digits as its factorization.

1994920230817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 1994920230817 in words is "one trillion, nine hundred ninety-four billion, nine hundred twenty million, two hundred thirty thousand, eight hundred seventeen".