19255830 has 128 divisors (see below), whose sum is σ = 54743040. Its totient is φ = 4287360.

The previous prime is 19255829. The next prime is 19255879. The reversal of 19255830 is 3855291.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 19255791 and 19255800.

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 63 ways as a sum of consecutive naturals, for example, 326341 + ... + 326399.

It is an arithmetic number, because the mean of its divisors is an integer number (427680).

Almost surely, 2^19255830 is an apocalyptic number.

19255830 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 19255830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27371520).

19255830 is an abundant number, since it is smaller than the sum of its proper divisors (35487210).

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

19255830 is a wasteful number, since it uses less digits than its factorization.

19255830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 19255830 is about 4388.1465335606. The cubic root of 19255830 is about 268.0324736027.

The spelling of 19255830 in words is "nineteen million, two hundred fifty-five thousand, eight hundred thirty".