20089100 has 18 divisors (see below), whose sum is σ = 43593564. Its totient is φ = 8035600.

The previous prime is 20089081. The next prime is 20089103. The reversal of 20089100 is 198002.

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

It is not an unprimeable number, because it can be changed into a prime (20089103) 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, 100346 + ... + 100545.

Almost surely, 2^20089100 is an apocalyptic number.

20089100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20089100 is an abundant number, since it is smaller than the sum of its proper divisors (23504464).

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

20089100 is a wasteful number, since it uses less digits than its factorization.

20089100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200905 (or 200898 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 20089100 is about 4482.0865676602. The cubic root of 20089100 is about 271.8442555625.

The spelling of 20089100 in words is "twenty million, eighty-nine thousand, one hundred".