19012100 has 18 divisors (see below), whose sum is σ = 41256474. Its totient is φ = 7604800.

The previous prime is 19012093. The next prime is 19012153. The reversal of 19012100 is 121091.

It can be written as a sum of positive squares in 3 ways, for example, as 6635776 + 12376324 = 2576^2 + 3518^2 .

It is a super-2 number, since 2×19012100² = 722919892820000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 94961 + ... + 95160.

Almost surely, 2^19012100 is an apocalyptic number.

19012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19012100 is an abundant number, since it is smaller than the sum of its proper divisors (22244374).

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

19012100 is a wasteful number, since it uses less digits than its factorization.

19012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190135 (or 190128 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 19012100 is about 4360.2866878223. The cubic root of 19012100 is about 266.8967978693.

Adding to 19012100 its reverse (121091), we get a palindrome (19133191).

The spelling of 19012100 in words is "nineteen million, twelve thousand, one hundred".