18152019 has 20 divisors (see below), whose sum is σ = 27994560. Its totient is φ = 11709360.

The previous prime is 18152009. The next prime is 18152021. The reversal of 18152019 is 91025181.

It is not a de Polignac number, because 18152019 - 2¹² = 18147923 is a prime.

It is a super-2 number, since 2×18152019² = 658991587552722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18151983 and 18152001.

It is not an unprimeable number, because it can be changed into a prime (18152009) 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 19 ways as a sum of consecutive naturals, for example, 1104 + ... + 6125.

It is an arithmetic number, because the mean of its divisors is an integer number (1399728).

Almost surely, 2^18152019 is an apocalyptic number.

18152019 is a deficient number, since it is larger than the sum of its proper divisors (9842541).

18152019 is an equidigital number, since it uses as much as digits as its factorization.

18152019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7272 (or 7263 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 18152019 is about 4260.5186304017. The cubic root of 18152019 is about 262.8098545126.

The spelling of 18152019 in words is "eighteen million, one hundred fifty-two thousand, nineteen".