18803539747 has 2 divisors, whose sum is σ = 18803539748. Its totient is φ = 18803539746.

The previous prime is 18803539739. The next prime is 18803539759. The reversal of 18803539747 is 74793530881.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18803539747 - 2³ = 18803539739 is a prime.

It is not a weakly prime, because it can be changed into another prime (18803539847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9401769873 + 9401769874.

It is an arithmetic number, because the mean of its divisors is an integer number (9401769874).

Almost surely, 2^18803539747 is an apocalyptic number.

18803539747 is a deficient number, since it is larger than the sum of its proper divisors (1).

18803539747 is an equidigital number, since it uses as much as digits as its factorization.

18803539747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 18803539747 in words is "eighteen billion, eight hundred three million, five hundred thirty-nine thousand, seven hundred forty-seven".