19198900 has 36 divisors (see below), whose sum is σ = 47615008. Its totient is φ = 6582240.

The previous prime is 19198877. The next prime is 19198901. The reversal of 19198900 is 989191.

It is a super-2 number, since 2×19198900² = 737195522420000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19198900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19198901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13014 + ... + 14413.

Almost surely, 2^19198900 is an apocalyptic number.

19198900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19198900 is an abundant number, since it is smaller than the sum of its proper divisors (28416108).

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

19198900 is a wasteful number, since it uses less digits than its factorization.

19198900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27448 (or 27441 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 19198900 is about 4381.6549384907. The cubic root of 19198900 is about 267.7680662113.

The spelling of 19198900 in words is "nineteen million, one hundred ninety-eight thousand, nine hundred".