19131830 has 16 divisors (see below), whose sum is σ = 35277984. Its totient is φ = 7465920.

The previous prime is 19131823. The next prime is 19131859. The reversal of 19131830 is 3813191.

It is a self number, because there is not a number n which added to its sum of digits gives 19131830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22922 + ... + 23741.

It is an arithmetic number, because the mean of its divisors is an integer number (2204874).

Almost surely, 2^19131830 is an apocalyptic number.

19131830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19131830 is a deficient number, since it is larger than the sum of its proper divisors (16146154).

19131830 is a wasteful number, since it uses less digits than its factorization.

19131830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46711.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 19131830 is about 4373.9947416521. The cubic root of 19131830 is about 267.4558928063.

The spelling of 19131830 in words is "nineteen million, one hundred thirty-one thousand, eight hundred thirty".