19000100 has 36 divisors (see below), whose sum is σ = 47121984. Its totient is φ = 6514080.

The previous prime is 19000099. The next prime is 19000103. The reversal of 19000100 is 100091.

It is a super-2 number, since 2×19000100² = 722007600020000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19000103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12872 + ... + 14271.

It is an arithmetic number, because the mean of its divisors is an integer number (1308944).

Almost surely, 2^19000100 is an apocalyptic number.

19000100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19000100 is an abundant number, since it is smaller than the sum of its proper divisors (28121884).

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

19000100 is a wasteful number, since it uses less digits than its factorization.

19000100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27164 (or 27157 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 19000100 is about 4358.9104143123. The cubic root of 19000100 is about 266.8406330120.

Adding to 19000100 its reverse (100091), we get a palindrome (19100191).

The spelling of 19000100 in words is "nineteen million, one hundred", and thus it is an aban number.