18803539847 has 2 divisors, whose sum is σ = 18803539848. Its totient is φ = 18803539846.

The previous prime is 18803539841. The next prime is 18803539879. The reversal of 18803539847 is 74893530881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18803539847 - 2¹⁶ = 18803474311 is a prime.

It is a super-2 number, since 2×18803539847² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18803539792 and 18803539801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18803539841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9401769923 + 9401769924.

It is an arithmetic number, because the mean of its divisors is an integer number (9401769924).

Almost surely, 2^18803539847 is an apocalyptic number.

18803539847 is a deficient number, since it is larger than the sum of its proper divisors (1).

18803539847 is an equidigital number, since it uses as much as digits as its factorization.

18803539847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 18803539847 in words is "eighteen billion, eight hundred three million, five hundred thirty-nine thousand, eight hundred forty-seven".