18119215 has 8 divisors (see below), whose sum is σ = 21858048. Its totient is φ = 14418720.

The previous prime is 18119207. The next prime is 18119219. The reversal of 18119215 is 51291181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18119215 - 2³ = 18119207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18119219) 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 7 ways as a sum of consecutive naturals, for example, 8532 + ... + 10441.

It is an arithmetic number, because the mean of its divisors is an integer number (2732256).

Almost surely, 2^18119215 is an apocalyptic number.

18119215 is a deficient number, since it is larger than the sum of its proper divisors (3738833).

18119215 is a wasteful number, since it uses less digits than its factorization.

18119215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19169.

The product of its digits is 720, while the sum is 28.

The square root of 18119215 is about 4256.6671234664. The cubic root of 18119215 is about 262.6514439788.

It can be divided in two parts, 1811 and 9215, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 18119215 in words is "eighteen million, one hundred nineteen thousand, two hundred fifteen".