19163420 has 48 divisors (see below), whose sum is σ = 43001280. Its totient is φ = 7148544.

The previous prime is 19163401. The next prime is 19163429. The reversal of 19163420 is 2436191.

It is a self number, because there is not a number n which added to its sum of digits gives 19163420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19163429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53201 + ... + 53559.

It is an arithmetic number, because the mean of its divisors is an integer number (895860).

Almost surely, 2^19163420 is an apocalyptic number.

19163420 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 19163420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21500640).

19163420 is an abundant number, since it is smaller than the sum of its proper divisors (23837860).

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

19163420 is a wasteful number, since it uses less digits than its factorization.

19163420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 19163420 is about 4377.6043676879. The cubic root of 19163420 is about 267.6030173573.

The spelling of 19163420 in words is "nineteen million, one hundred sixty-three thousand, four hundred twenty".