19182420 has 72 divisors (see below), whose sum is σ = 60357024. Its totient is φ = 5114016.

The previous prime is 19182407. The next prime is 19182421. The reversal of 19182420 is 2428191.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19182421) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2887 + ... + 6833.

It is an arithmetic number, because the mean of its divisors is an integer number (838292).

Almost surely, 2^19182420 is an apocalyptic number.

19182420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19182420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30178512).

19182420 is an abundant number, since it is smaller than the sum of its proper divisors (41174604).

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

19182420 is a wasteful number, since it uses less digits than its factorization.

19182420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971 (or 3957 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 19182420 is about 4379.7739667704. The cubic root of 19182420 is about 267.6914284705.

It can be divided in two parts, 191824 and 20, that added together give a square (191844 = 438²).

The spelling of 19182420 in words is "nineteen million, one hundred eighty-two thousand, four hundred twenty".