18129100 has 36 divisors (see below), whose sum is σ = 42919128. Its totient is φ = 6592000.

The previous prime is 18129091. The next prime is 18129103. The reversal of 18129100 is 192181.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (18129103) 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, 7141 + ... + 9340.

It is an arithmetic number, because the mean of its divisors is an integer number (1192198).

Almost surely, 2^18129100 is an apocalyptic number.

18129100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18129100 is an abundant number, since it is smaller than the sum of its proper divisors (24790028).

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

18129100 is a wasteful number, since it uses less digits than its factorization.

18129100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16506 (or 16499 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 18129100 is about 4257.8280848339. The cubic root of 18129100 is about 262.6991987615.

The spelling of 18129100 in words is "eighteen million, one hundred twenty-nine thousand, one hundred".