18098771900 has 36 divisors (see below), whose sum is σ = 42844731720. Its totient is φ = 6581371200.

The previous prime is 18098771851. The next prime is 18098771903. The reversal of 18098771900 is 917789081.

It is a super-2 number, since 2×18098771900² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18098771903) 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 11 ways as a sum of consecutive naturals, for example, 8225615 + ... + 8227814.

Almost surely, 2^18098771900 is an apocalyptic number.

18098771900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18098771900 is an abundant number, since it is smaller than the sum of its proper divisors (24745959820).

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

18098771900 is a wasteful number, since it uses less digits than its factorization.

18098771900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16453454 (or 16453447 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 50.

The spelling of 18098771900 in words is "eighteen billion, ninety-eight million, seven hundred seventy-one thousand, nine hundred".