1818182020000 has 60 divisors (see below), whose sum is σ = 4473000545706. Its totient is φ = 727272800000.

The previous prime is 1818182019971. The next prime is 1818182020001. The reversal of 1818182020000 is 202818181.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 15618000784 + 1802564019216 = 124972^2 + 1342596^2 .

It is not an unprimeable number, because it can be changed into a prime (1818182020001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 45434551 + ... + 45474550.

Almost surely, 2^{1818182020000} is an apocalyptic number.

1818182020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1818182020000 is an abundant number, since it is smaller than the sum of its proper divisors (2654818525706).

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

1818182020000 is an frugal number, since it uses more digits than its factorization.

1818182020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90909131 (or 90909108 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 31.

Adding to 1818182020000 its reverse (202818181), we get a palindrome (1818384838181).

The spelling of 1818182020000 in words is "one trillion, eight hundred eighteen billion, one hundred eighty-two million, twenty thousand".