18125047 has 2 divisors, whose sum is σ = 18125048. Its totient is φ = 18125046.

The previous prime is 18125027. The next prime is 18125071. The reversal of 18125047 is 74052181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18125047 - 2⁷ = 18124919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18125017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9062523 + 9062524.

It is an arithmetic number, because the mean of its divisors is an integer number (9062524).

Almost surely, 2^18125047 is an apocalyptic number.

18125047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18125047 is an equidigital number, since it uses as much as digits as its factorization.

18125047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 18125047 is about 4257.3521113481. The cubic root of 18125047 is about 262.6796206761.

It can be divided in two parts, 1812 and 5047, that added together give a cube (6859 = 19³).

The spelling of 18125047 in words is "eighteen million, one hundred twenty-five thousand, forty-seven".