19131030 has 48 divisors (see below), whose sum is σ = 51352704. Its totient is φ = 4936320.

The previous prime is 19131029. The next prime is 19131031. The reversal of 19131030 is 3013191.

It is an interprime number because it is at equal distance from previous prime (19131029) and next prime (19131031).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 19130994 and 19131012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19131031) 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 23 ways as a sum of consecutive naturals, for example, 639 + ... + 6218.

It is an arithmetic number, because the mean of its divisors is an integer number (1069848).

Almost surely, 2^19131030 is an apocalyptic number.

19131030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19131030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25676352).

19131030 is an abundant number, since it is smaller than the sum of its proper divisors (32221674).

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

19131030 is a wasteful number, since it uses less digits than its factorization.

19131030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6901 (or 6898 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 18.

The square root of 19131030 is about 4373.9032911120. The cubic root of 19131030 is about 267.4521648532.

The spelling of 19131030 in words is "nineteen million, one hundred thirty-one thousand, thirty".