18113151 has 16 divisors (see below), whose sum is σ = 27675648. Its totient is φ = 10322400.

The previous prime is 18113149. The next prime is 18113153. The reversal of 18113151 is 15131181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18113149) and next prime (18113153).

It is not a de Polignac number, because 18113151 - 2¹ = 18113149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18113153) 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 15 ways as a sum of consecutive naturals, for example, 8746 + ... + 10616.

It is an arithmetic number, because the mean of its divisors is an integer number (1729728).

Almost surely, 2^18113151 is an apocalyptic number.

18113151 is a deficient number, since it is larger than the sum of its proper divisors (9562497).

18113151 is a wasteful number, since it uses less digits than its factorization.

18113151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342.

The product of its digits is 120, while the sum is 21.

The square root of 18113151 is about 4255.9547694965. The cubic root of 18113151 is about 262.6221399854.

The spelling of 18113151 in words is "eighteen million, one hundred thirteen thousand, one hundred fifty-one".