18038245 has 4 divisors (see below), whose sum is σ = 21645900. Its totient is φ = 14430592.

The previous prime is 18038243. The next prime is 18038257. The reversal of 18038245 is 54283081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54283081 = 241 ⋅225241.

It can be written as a sum of positive squares in 2 ways, for example, as 5654884 + 12383361 = 2378^2 + 3519^2 .

It is a cyclic number.

It is not a de Polignac number, because 18038245 - 2¹ = 18038243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18038243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1803820 + ... + 1803829.

It is an arithmetic number, because the mean of its divisors is an integer number (5411475).

Almost surely, 2^18038245 is an apocalyptic number.

It is an amenable number.

18038245 is a deficient number, since it is larger than the sum of its proper divisors (3607655).

18038245 is an equidigital number, since it uses as much as digits as its factorization.

18038245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607654.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 18038245 is about 4247.1455119880. The cubic root of 18038245 is about 262.2596197008.

The spelling of 18038245 in words is "eighteen million, thirty-eight thousand, two hundred forty-five".