18202020000 has 120 divisors (see below), whose sum is σ = 59706462816. Its totient is φ = 4853856000.

The previous prime is 18202019989. The next prime is 18202020017. The reversal of 18202020000 is 2020281.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 91684 + ... + 211683.

Almost surely, 2^18202020000 is an apocalyptic number.

18202020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18202020000 is an abundant number, since it is smaller than the sum of its proper divisors (41504442816).

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

18202020000 is an equidigital number, since it uses as much as digits as its factorization.

18202020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303400 (or 303377 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 18202020000 its reverse (2020281), we get a palindrome (18204040281).

The spelling of 18202020000 in words is "eighteen billion, two hundred two million, twenty thousand".