18113357800 has 48 divisors (see below), whose sum is σ = 42346313100. Its totient is φ = 7205299200.

The previous prime is 18113357791. The next prime is 18113357803. The reversal of 18113357800 is 875331181.

It can be written as a sum of positive squares in 6 ways, for example, as 99960004 + 18013397796 = 9998^2 + 134214^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18113357800.

It is not an unprimeable number, because it can be changed into a prime (18113357803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213985 + ... + 286384.

Almost surely, 2^18113357800 is an apocalyptic number.

18113357800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18113357800 is an abundant number, since it is smaller than the sum of its proper divisors (24232955300).

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

18113357800 is a wasteful number, since it uses less digits than its factorization.

18113357800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500566 (or 500557 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

Adding to 18113357800 its reverse (875331181), we get a palindrome (18988688981).

The spelling of 18113357800 in words is "eighteen billion, one hundred thirteen million, three hundred fifty-seven thousand, eight hundred".