18212030011100 has 18 divisors (see below), whose sum is σ = 39520105124304. Its totient is φ = 7284812004400.

The previous prime is 18212030011073. The next prime is 18212030011169. The reversal of 18212030011100 is 111003021281.

It is a happy number.

It is a super-2 number, since 2×18212030011100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91060149956 + ... + 91060150155.

Almost surely, 2^{18212030011100} is an apocalyptic number.

18212030011100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18212030011100 is an abundant number, since it is smaller than the sum of its proper divisors (21308075113204).

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

18212030011100 is a wasteful number, since it uses less digits than its factorization.

18212030011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182120300125 (or 182120300118 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 18212030011100 its reverse (111003021281), we get a palindrome (18323033032381).

The spelling of 18212030011100 in words is "eighteen trillion, two hundred twelve billion, thirty million, eleven thousand, one hundred".