1868368518 has 40 divisors (see below), whose sum is σ = 4209725520. Its totient is φ = 619338960.

The previous prime is 1868368457. The next prime is 1868368531. The reversal of 1868368518 is 8158638681.

1868368518 is a `hidden beast` number, since 1 + 8 + 68 + 3 + 68 + 518 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2538 + ... + 61181.

It is an arithmetic number, because the mean of its divisors is an integer number (105243138).

Almost surely, 2^1868368518 is an apocalyptic number.

1868368518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1868368518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2104862760).

1868368518 is an abundant number, since it is smaller than the sum of its proper divisors (2341357002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1868368518 is a wasteful number, since it uses less digits than its factorization.

1868368518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63914 (or 63905 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The square root of 1868368518 is about 43224.6286045352. The cubic root of 1868368518 is about 1231.6505740601.

The spelling of 1868368518 in words is "one billion, eight hundred sixty-eight million, three hundred sixty-eight thousand, five hundred eighteen".