18485720200 has 24 divisors (see below), whose sum is σ = 42979299930. Its totient is φ = 7394288000.

The previous prime is 18485720191. The next prime is 18485720203. The reversal of 18485720200 is 202758481.

It can be written as a sum of positive squares in 3 ways, for example, as 17019289764 + 1466430436 = 130458^2 + 38294^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18485720200.

It is not an unprimeable number, because it can be changed into a prime (18485720203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46214101 + ... + 46214500.

Almost surely, 2^18485720200 is an apocalyptic number.

18485720200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18485720200 is an abundant number, since it is smaller than the sum of its proper divisors (24493579730).

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

18485720200 is a wasteful number, since it uses less digits than its factorization.

18485720200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92428617 (or 92428608 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The spelling of 18485720200 in words is "eighteen billion, four hundred eighty-five million, seven hundred twenty thousand, two hundred".