18019018100 has 18 divisors (see below), whose sum is σ = 39101269494. Its totient is φ = 7207607200.

The previous prime is 18019018099. The next prime is 18019018153. The reversal of 18019018100 is 181091081.

It can be written as a sum of positive squares in 3 ways, for example, as 2659877476 + 15359140624 = 51574^2 + 123932^2 .

It is a super-2 number, since 2×18019018100² (a number of 21 digits) contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 90094991 + ... + 90095190.

Almost surely, 2^18019018100 is an apocalyptic number.

18019018100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18019018100 is an abundant number, since it is smaller than the sum of its proper divisors (21082251394).

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

18019018100 is a wasteful number, since it uses less digits than its factorization.

18019018100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180190195 (or 180190188 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 29.

The spelling of 18019018100 in words is "eighteen billion, nineteen million, eighteen thousand, one hundred".