18005379 has 24 divisors (see below), whose sum is σ = 27998208. Its totient is φ = 10082160.

The previous prime is 18005357. The next prime is 18005381. The reversal of 18005379 is 97350081.

It is not a de Polignac number, because 18005379 - 2¹⁶ = 17939843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18005399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94174 + ... + 94364.

It is an arithmetic number, because the mean of its divisors is an integer number (1166592).

Almost surely, 2^18005379 is an apocalyptic number.

18005379 is a deficient number, since it is larger than the sum of its proper divisors (9992829).

18005379 is an equidigital number, since it uses as much as digits as its factorization.

18005379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 18005379 is about 4243.2745609965. The cubic root of 18005379 is about 262.1002423171.

It can be divided in two parts, 1800 and 5379, that multiplied together give a triangular number (9682200 = T₄₄₀₀).

The spelling of 18005379 in words is "eighteen million, five thousand, three hundred seventy-nine".