1899712818 has 16 divisors (see below), whose sum is σ = 4221584160. Its totient is φ = 633237588.

The previous prime is 1899712783. The next prime is 1899712847. The reversal of 1899712818 is 8182179981.

It is a super-2 number, since 2×1899712818² = 7217817581747002248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 35179867 = 1899712818 / (1 + 8 + 9 + 9 + 7 + 1 + 2 + 8 + 1 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17589880 + ... + 17589987.

It is an arithmetic number, because the mean of its divisors is an integer number (263849010).

Almost surely, 2^1899712818 is an apocalyptic number.

1899712818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1899712818 is an abundant number, since it is smaller than the sum of its proper divisors (2321871342).

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

1899712818 is a wasteful number, since it uses less digits than its factorization.

1899712818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35179878 (or 35179872 counting only the distinct ones).

The product of its digits is 580608, while the sum is 54.

The square root of 1899712818 is about 43585.6951074547. The cubic root of 1899712818 is about 1238.4999242391.

The spelling of 1899712818 in words is "one billion, eight hundred ninety-nine million, seven hundred twelve thousand, eight hundred eighteen".