1918187712 has 420 divisors, whose sum is σ = 6844187480. Its totient is φ = 512096256.

The previous prime is 1918187701. The next prime is 1918187737. The reversal of 1918187712 is 2177818191.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 59 ways as a sum of consecutive naturals, for example, 26276508 + ... + 26276580.

Almost surely, 2^1918187712 is an apocalyptic number.

1918187712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1918187712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3422093740).

1918187712 is an abundant number, since it is smaller than the sum of its proper divisors (4925999768).

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

1918187712 is an equidigital number, since it uses as much as digits as its factorization.

1918187712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 104 counting only the distinct ones).

The product of its digits is 56448, while the sum is 45.

The square root of 1918187712 is about 43797.1199053088. The cubic root of 1918187712 is about 1242.5018237095.

The spelling of 1918187712 in words is "one billion, nine hundred eighteen million, one hundred eighty-seven thousand, seven hundred twelve".