19131090 has 32 divisors (see below), whose sum is σ = 50089536. Its totient is φ = 4637760.

The previous prime is 19131089. The next prime is 19131127. The reversal of 19131090 is 9013191.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 19131090.

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, 28657 + ... + 29316.

It is an arithmetic number, because the mean of its divisors is an integer number (1565298).

Almost surely, 2^19131090 is an apocalyptic number.

19131090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19131090 is an abundant number, since it is smaller than the sum of its proper divisors (30958446).

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

19131090 is a wasteful number, since it uses less digits than its factorization.

19131090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57994.

The product of its (nonzero) digits is 243, while the sum is 24.

The square root of 19131090 is about 4373.9101499688. The cubic root of 19131090 is about 267.4524444533.

It can be divided in two parts, 1913 and 1090, that added together give a palindrome (3003).

The spelling of 19131090 in words is "nineteen million, one hundred thirty-one thousand, ninety".