18761930738009 has 2 divisors, whose sum is σ = 18761930738010. Its totient is φ = 18761930738008.

The previous prime is 18761930737981. The next prime is 18761930738011. The reversal of 18761930738009 is 90083703916781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18365853091600 + 396077646409 = 4285540^2 + 629347^2 .

It is a cyclic number.

It is not a de Polignac number, because 18761930738009 - 2²⁸ = 18761662302553 is a prime.

It is a Sophie Germain prime.

Together with 18761930738011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18761930734009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9380965369004 + 9380965369005.

It is an arithmetic number, because the mean of its divisors is an integer number (9380965369005).

Almost surely, 2^{18761930738009} is an apocalyptic number.

It is an amenable number.

18761930738009 is a deficient number, since it is larger than the sum of its proper divisors (1).

18761930738009 is an equidigital number, since it uses as much as digits as its factorization.

18761930738009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13716864, while the sum is 62.

The spelling of 18761930738009 in words is "eighteen trillion, seven hundred sixty-one billion, nine hundred thirty million, seven hundred thirty-eight thousand, nine".