19112830 has 32 divisors (see below), whose sum is σ = 37739520. Its totient is φ = 6911520.

The previous prime is 19112791. The next prime is 19112843. The reversal of 19112830 is 3821191.

It is a junction number, because it is equal to n+sod(n) for n = 19112795 and 19112804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25927 + ... + 26653.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360).

Almost surely, 2^19112830 is an apocalyptic number.

19112830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19112830 is a deficient number, since it is larger than the sum of its proper divisors (18626690).

19112830 is a wasteful number, since it uses less digits than its factorization.

19112830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 19112830 is about 4371.8222745212. The cubic root of 19112830 is about 267.3673258282.

The spelling of 19112830 in words is "nineteen million, one hundred twelve thousand, eight hundred thirty".