18813479 has 2 divisors, whose sum is σ = 18813480. Its totient is φ = 18813478.

The previous prime is 18813469. The next prime is 18813481. The reversal of 18813479 is 97431881.

It is a strong prime.

It is an emirp because it is prime and its reverse (97431881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18813479 - 2²⁴ = 2036263 is a prime.

It is a Sophie Germain prime.

Together with 18813481, 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 (18813419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9406739 + 9406740.

It is an arithmetic number, because the mean of its divisors is an integer number (9406740).

Almost surely, 2^18813479 is an apocalyptic number.

18813479 is a deficient number, since it is larger than the sum of its proper divisors (1).

18813479 is an equidigital number, since it uses as much as digits as its factorization.

18813479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 41.

The square root of 18813479 is about 4337.4507489999. The cubic root of 18813479 is about 265.9641112755.

The spelling of 18813479 in words is "eighteen million, eight hundred thirteen thousand, four hundred seventy-nine".