18830438747 has 2 divisors, whose sum is σ = 18830438748. Its totient is φ = 18830438746.

The previous prime is 18830438689. The next prime is 18830438777. The reversal of 18830438747 is 74783403881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18830438747 - 2¹⁰ = 18830437723 is a prime.

It is not a weakly prime, because it can be changed into another prime (18830438777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9415219373 + 9415219374.

It is an arithmetic number, because the mean of its divisors is an integer number (9415219374).

Almost surely, 2^18830438747 is an apocalyptic number.

18830438747 is a deficient number, since it is larger than the sum of its proper divisors (1).

18830438747 is an equidigital number, since it uses as much as digits as its factorization.

18830438747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3612672, while the sum is 53.

The spelling of 18830438747 in words is "eighteen billion, eight hundred thirty million, four hundred thirty-eight thousand, seven hundred forty-seven".