1818194803872 has 48 divisors (see below), whose sum is σ = 4776358349952. Its totient is φ = 605608174080.

The previous prime is 1818194803871. The next prime is 1818194803927. The reversal of 1818194803872 is 2783084918181.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (1818194803871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7008829 + ... + 7263612.

It is an arithmetic number, because the mean of its divisors is an integer number (99507465624).

Almost surely, 2^{1818194803872} is an apocalyptic number.

1818194803872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1818194803872 is an abundant number, since it is smaller than the sum of its proper divisors (2958163546080).

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

1818194803872 is a wasteful number, since it uses less digits than its factorization.

1818194803872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14273781 (or 14273773 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 60.

The spelling of 1818194803872 in words is "one trillion, eight hundred eighteen billion, one hundred ninety-four million, eight hundred three thousand, eight hundred seventy-two".