18345479 has 2 divisors, whose sum is σ = 18345480. Its totient is φ = 18345478.

The previous prime is 18345461. The next prime is 18345517. The reversal of 18345479 is 97454381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18345479 - 2¹² = 18341383 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18345179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9172739 + 9172740.

It is an arithmetic number, because the mean of its divisors is an integer number (9172740).

Almost surely, 2^18345479 is an apocalyptic number.

18345479 is a deficient number, since it is larger than the sum of its proper divisors (1).

18345479 is an equidigital number, since it uses as much as digits as its factorization.

18345479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 18345479 is about 4283.1622663635. The cubic root of 18345479 is about 263.7402125700.

The spelling of 18345479 in words is "eighteen million, three hundred forty-five thousand, four hundred seventy-nine".