18906738278359 has 2 divisors, whose sum is σ = 18906738278360. Its totient is φ = 18906738278358.

The previous prime is 18906738278347. The next prime is 18906738278401. The reversal of 18906738278359 is 95387283760981.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18906738278359 - 2¹⁹ = 18906737754071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18906738278159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9453369139179 + 9453369139180.

It is an arithmetic number, because the mean of its divisors is an integer number (9453369139180).

Almost surely, 2^{18906738278359} is an apocalyptic number.

18906738278359 is a deficient number, since it is larger than the sum of its proper divisors (1).

18906738278359 is an equidigital number, since it uses as much as digits as its factorization.

18906738278359 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1097349120, while the sum is 76.

The spelling of 18906738278359 in words is "eighteen trillion, nine hundred six billion, seven hundred thirty-eight million, two hundred seventy-eight thousand, three hundred fifty-nine".