18488137 has 2 divisors, whose sum is σ = 18488138. Its totient is φ = 18488136.

The previous prime is 18488131. The next prime is 18488143. The reversal of 18488137 is 73188481.

It is a balanced prime because it is at equal distance from previous prime (18488131) and next prime (18488143).

It can be written as a sum of positive squares in only one way, i.e., 17606416 + 881721 = 4196^2 + 939^2 .

It is a cyclic number.

It is not a de Polignac number, because 18488137 - 2¹⁵ = 18455369 is a prime.

It is a super-2 number, since 2×18488137² = 683622419461538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18488137.

It is not a weakly prime, because it can be changed into another prime (18488131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9244068 + 9244069.

It is an arithmetic number, because the mean of its divisors is an integer number (9244069).

Almost surely, 2^18488137 is an apocalyptic number.

It is an amenable number.

18488137 is a deficient number, since it is larger than the sum of its proper divisors (1).

18488137 is an equidigital number, since it uses as much as digits as its factorization.

18488137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 40.

The square root of 18488137 is about 4299.7833666360. The cubic root of 18488137 is about 264.4220798367.

The spelling of 18488137 in words is "eighteen million, four hundred eighty-eight thousand, one hundred thirty-seven".