1868382019 has 4 divisors (see below), whose sum is σ = 2135293744. Its totient is φ = 1601470296.

The previous prime is 1868382017. The next prime is 1868382029. The reversal of 1868382019 is 9102838681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1868382019 - 2¹ = 1868382017 is a prime.

It is a super-2 number, since 2×1868382019² = 6981702737845032722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1868382019.

It is not an unprimeable number, because it can be changed into a prime (1868382011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133455852 + ... + 133455865.

It is an arithmetic number, because the mean of its divisors is an integer number (533823436).

Almost surely, 2^1868382019 is an apocalyptic number.

1868382019 is a deficient number, since it is larger than the sum of its proper divisors (266911725).

1868382019 is an equidigital number, since it uses as much as digits as its factorization.

1868382019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266911724.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 1868382019 is about 43224.7847767921. The cubic root of 1868382019 is about 1231.6535407258.

The spelling of 1868382019 in words is "one billion, eight hundred sixty-eight million, three hundred eighty-two thousand, nineteen".