1868503819 has 20 divisors (see below), whose sum is σ = 2347506896. Its totient is φ = 1478351952.

The previous prime is 1868503799. The next prime is 1868503823. The reversal of 1868503819 is 9183058681.

It is not a de Polignac number, because 1868503819 - 2¹¹ = 1868501771 is a prime.

It is a super-2 number, since 2×1868503819² = 6982613043235169522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (1868503849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1282 + ... + 61144.

Almost surely, 2^1868503819 is an apocalyptic number.

1868503819 is a deficient number, since it is larger than the sum of its proper divisors (479003077).

1868503819 is an frugal number, since it uses more digits than its factorization.

1868503819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59904 (or 59883 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 49.

The square root of 1868503819 is about 43226.1936677288. The cubic root of 1868503819 is about 1231.6803040144.

The spelling of 1868503819 in words is "one billion, eight hundred sixty-eight million, five hundred three thousand, eight hundred nineteen".