18071479 has 2 divisors, whose sum is σ = 18071480. Its totient is φ = 18071478.

The previous prime is 18071461. The next prime is 18071509. The reversal of 18071479 is 97417081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18071479 - 2⁷ = 18071351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18071279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9035739 + 9035740.

It is an arithmetic number, because the mean of its divisors is an integer number (9035740).

Almost surely, 2^18071479 is an apocalyptic number.

18071479 is a deficient number, since it is larger than the sum of its proper divisors (1).

18071479 is an equidigital number, since it uses as much as digits as its factorization.

18071479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 18071479 is about 4251.0562216936. The cubic root of 18071479 is about 262.4205848958.

The spelling of 18071479 in words is "eighteen million, seventy-one thousand, four hundred seventy-nine".