18488345 has 16 divisors (see below), whose sum is σ = 23114640. Its totient is φ = 14193792.

The previous prime is 18488339. The next prime is 18488347. The reversal of 18488345 is 54388481.

It can be written as a sum of positive squares in 8 ways, for example, as 1157776 + 17330569 = 1076^2 + 4163^2 .

It is not a de Polignac number, because 18488345 - 2¹⁰ = 18487321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18488347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253229 + ... + 253301.

It is an arithmetic number, because the mean of its divisors is an integer number (1444665).

Almost surely, 2^18488345 is an apocalyptic number.

It is an amenable number.

18488345 is a deficient number, since it is larger than the sum of its proper divisors (4626295).

18488345 is an frugal number, since it uses more digits than its factorization.

18488345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 115 counting only the distinct ones).

The product of its digits is 122880, while the sum is 41.

The square root of 18488345 is about 4299.8075538331. The cubic root of 18488345 is about 264.4230714562.

The spelling of 18488345 in words is "eighteen million, four hundred eighty-eight thousand, three hundred forty-five".