18830047 has 2 divisors, whose sum is σ = 18830048. Its totient is φ = 18830046.

The previous prime is 18830041. The next prime is 18830057. The reversal of 18830047 is 74003881.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18830047 - 2³ = 18830039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18830041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9415023 + 9415024.

It is an arithmetic number, because the mean of its divisors is an integer number (9415024).

Almost surely, 2^18830047 is an apocalyptic number.

18830047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18830047 is an equidigital number, since it uses as much as digits as its factorization.

18830047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18830047 is about 4339.3602062977. The cubic root of 18830047 is about 266.0421617078.

The spelling of 18830047 in words is "eighteen million, eight hundred thirty thousand, forty-seven".