18980047 has 2 divisors, whose sum is σ = 18980048. Its totient is φ = 18980046.

The previous prime is 18980011. The next prime is 18980053. The reversal of 18980047 is 74008981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18980047 - 2²³ = 10591439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18979988 and 18980015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18980077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9490023 + 9490024.

It is an arithmetic number, because the mean of its divisors is an integer number (9490024).

Almost surely, 2^18980047 is an apocalyptic number.

18980047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18980047 is an equidigital number, since it uses as much as digits as its factorization.

18980047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 18980047 is about 4356.6095762646. The cubic root of 18980047 is about 266.7467240534.

The spelling of 18980047 in words is "eighteen million, nine hundred eighty thousand, forty-seven".