18200920011100 has 72 divisors (see below), whose sum is σ = 39635764898688. Its totient is φ = 7254644409600.

The previous prime is 18200920011091. The next prime is 18200920011137. The reversal of 18200920011100 is 111002900281.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36081822 + ... + 36582778.

It is an arithmetic number, because the mean of its divisors is an integer number (550496734704).

Almost surely, 2^{18200920011100} is an apocalyptic number.

18200920011100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18200920011100 is an abundant number, since it is smaller than the sum of its proper divisors (21434844887588).

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

18200920011100 is a wasteful number, since it uses less digits than its factorization.

18200920011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502255 (or 502248 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 25.

Adding to 18200920011100 its reverse (111002900281), we get a palindrome (18311922911381).

The spelling of 18200920011100 in words is "eighteen trillion, two hundred billion, nine hundred twenty million, eleven thousand, one hundred".