18923028727 has 2 divisors, whose sum is σ = 18923028728. Its totient is φ = 18923028726.

The previous prime is 18923028697. The next prime is 18923028743. The reversal of 18923028727 is 72782032981.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18923028727 - 2²³ = 18914640119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18923028227) 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, 9461514363 + 9461514364.

It is an arithmetic number, because the mean of its divisors is an integer number (9461514364).

Almost surely, 2^18923028727 is an apocalyptic number.

18923028727 is a deficient number, since it is larger than the sum of its proper divisors (1).

18923028727 is an equidigital number, since it uses as much as digits as its factorization.

18923028727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 18923028727 in words is "eighteen billion, nine hundred twenty-three million, twenty-eight thousand, seven hundred twenty-seven".