18100102100 has 18 divisors (see below), whose sum is σ = 39277221774. Its totient is φ = 7240040800.

The previous prime is 18100102099. The next prime is 18100102109. The reversal of 18100102100 is 120100181.

It can be written as a sum of positive squares in 3 ways, for example, as 1678704784 + 16421397316 = 40972^2 + 128146^2 .

It is a super-2 number, since 2×18100102100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18100102109) 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, 90500411 + ... + 90500610.

Almost surely, 2^18100102100 is an apocalyptic number.

18100102100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18100102100 is an abundant number, since it is smaller than the sum of its proper divisors (21177119674).

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

18100102100 is a wasteful number, since it uses less digits than its factorization.

18100102100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181001035 (or 181001028 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 18100102100 its reverse (120100181), we get a palindrome (18220202281).

The spelling of 18100102100 in words is "eighteen billion, one hundred million, one hundred two thousand, one hundred".