18153479 has 2 divisors, whose sum is σ = 18153480. Its totient is φ = 18153478.

The previous prime is 18153431. The next prime is 18153481. The reversal of 18153479 is 97435181.

It is a strong prime.

It is an emirp because it is prime and its reverse (97435181) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18153479 is a prime.

Together with 18153481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18153679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9076739 + 9076740.

It is an arithmetic number, because the mean of its divisors is an integer number (9076740).

Almost surely, 2^18153479 is an apocalyptic number.

18153479 is a deficient number, since it is larger than the sum of its proper divisors (1).

18153479 is an equidigital number, since it uses as much as digits as its factorization.

18153479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 18153479 is about 4260.6899675991. The cubic root of 18153479 is about 262.8169004157.

The spelling of 18153479 in words is "eighteen million, one hundred fifty-three thousand, four hundred seventy-nine".