19823130 has 40 divisors (see below), whose sum is σ = 53304372. Its totient is φ = 5285952.

The previous prime is 19823123. The next prime is 19823149. The reversal of 19823130 is 3132891.

It can be written as a sum of positive squares in 2 ways, for example, as 19686969 + 136161 = 4437^2 + 369^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 19823094 and 19823103.

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 19 ways as a sum of consecutive naturals, for example, 11427 + ... + 13046.

Almost surely, 2^19823130 is an apocalyptic number.

19823130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19823130 is an abundant number, since it is smaller than the sum of its proper divisors (33481242).

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

19823130 is a wasteful number, since it uses less digits than its factorization.

19823130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24492 (or 24483 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 19823130 is about 4452.3173741323. The cubic root of 19823130 is about 270.6392261757.

The spelling of 19823130 in words is "nineteen million, eight hundred twenty-three thousand, one hundred thirty".