19130420 has 12 divisors (see below), whose sum is σ = 40173924. Its totient is φ = 7652160.

The previous prime is 19130407. The next prime is 19130471. The reversal of 19130420 is 2403191.

It can be written as a sum of positive squares in 2 ways, for example, as 12432676 + 6697744 = 3526^2 + 2588^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 956521 = 19130420 / (1 + 9 + 1 + 3 + 0 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 19130392 and 19130401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478241 + ... + 478280.

It is an arithmetic number, because the mean of its divisors is an integer number (3347827).

Almost surely, 2^19130420 is an apocalyptic number.

19130420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19130420 is an abundant number, since it is smaller than the sum of its proper divisors (21043504).

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

19130420 is a wasteful number, since it uses less digits than its factorization.

19130420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956530 (or 956528 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 19130420 is about 4373.8335587903. The cubic root of 19130420 is about 267.4493222191.

The spelling of 19130420 in words is "nineteen million, one hundred thirty thousand, four hundred twenty".