1800180019836 has 96 divisors (see below), whose sum is σ = 5091681288960. Its totient is φ = 545480913600.

The previous prime is 1800180019823. The next prime is 1800180019843. The reversal of 1800180019836 is 6389100810081.

It is a junction number, because it is equal to n+sod(n) for n = 1800180019791 and 1800180019800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41590446 + ... + 41633706.

It is an arithmetic number, because the mean of its divisors is an integer number (53038346760).

Almost surely, 2^{1800180019836} is an apocalyptic number.

It is an amenable number.

1800180019836 is an abundant number, since it is smaller than the sum of its proper divisors (3291501269124).

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

1800180019836 is a wasteful number, since it uses less digits than its factorization.

1800180019836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78312 (or 78304 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 1800180019836 in words is "one trillion, eight hundred billion, one hundred eighty million, nineteen thousand, eight hundred thirty-six".