18148939 has 2 divisors, whose sum is σ = 18148940. Its totient is φ = 18148938.

The previous prime is 18148901. The next prime is 18148951. The reversal of 18148939 is 93984181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18148939 - 2⁷ = 18148811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18148895 and 18148904.

It is not a weakly prime, because it can be changed into another prime (18140939) 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, 9074469 + 9074470.

It is an arithmetic number, because the mean of its divisors is an integer number (9074470).

Almost surely, 2^18148939 is an apocalyptic number.

18148939 is a deficient number, since it is larger than the sum of its proper divisors (1).

18148939 is an equidigital number, since it uses as much as digits as its factorization.

18148939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 43.

The square root of 18148939 is about 4260.1571567256. The cubic root of 18148939 is about 262.7949893133.

The spelling of 18148939 in words is "eighteen million, one hundred forty-eight thousand, nine hundred thirty-nine".