18061995 has 48 divisors (see below), whose sum is σ = 34318080. Its totient is φ = 7945920.

The previous prime is 18061993. The next prime is 18061997. The reversal of 18061995 is 59916081.

It is an interprime number because it is at equal distance from previous prime (18061993) and next prime (18061997).

It is not a de Polignac number, because 18061995 - 2¹ = 18061993 is a prime.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (18061991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 100816 + ... + 100994.

It is an arithmetic number, because the mean of its divisors is an integer number (714960).

Almost surely, 2^18061995 is an apocalyptic number.

18061995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18061995 is a deficient number, since it is larger than the sum of its proper divisors (16256085).

18061995 is a wasteful number, since it uses less digits than its factorization.

18061995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 18061995 is about 4249.9405878200. The cubic root of 18061995 is about 262.3746703301.

The spelling of 18061995 in words is "eighteen million, sixty-one thousand, nine hundred ninety-five".