19119890 has 32 divisors (see below), whose sum is σ = 36616320. Its totient is φ = 7167744.

The previous prime is 19119887. The next prime is 19119911. The reversal of 19119890 is 9891191.

It is a happy number.

It is a super-2 number, since 2×19119890² = 731140387224200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 19082 + ... + 20058.

It is an arithmetic number, because the mean of its divisors is an integer number (1144260).

Almost surely, 2^19119890 is an apocalyptic number.

19119890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19119890 is a deficient number, since it is larger than the sum of its proper divisors (17496430).

19119890 is a wasteful number, since it uses less digits than its factorization.

19119890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106.

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 19119890 is about 4372.6296435898. The cubic root of 19119890 is about 267.4002423028.

The spelling of 19119890 in words is "nineteen million, one hundred nineteen thousand, eight hundred ninety".