18290365 has 4 divisors (see below), whose sum is σ = 21948444. Its totient is φ = 14632288.

The previous prime is 18290357. The next prime is 18290383. The reversal of 18290365 is 56309281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4235364 + 14055001 = 2058^2 + 3749^2 .

It is a cyclic number.

It is not a de Polignac number, because 18290365 - 2³ = 18290357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18290365.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1829032 + ... + 1829041.

It is an arithmetic number, because the mean of its divisors is an integer number (5487111).

Almost surely, 2^18290365 is an apocalyptic number.

It is an amenable number.

18290365 is a deficient number, since it is larger than the sum of its proper divisors (3658079).

18290365 is an equidigital number, since it uses as much as digits as its factorization.

18290365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3658078.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 18290365 is about 4276.7236291348. The cubic root of 18290365 is about 263.4758357412.

The spelling of 18290365 in words is "eighteen million, two hundred ninety thousand, three hundred sixty-five".