19380420 has 72 divisors (see below), whose sum is σ = 59701824. Its totient is φ = 5087808.

The previous prime is 19380419. The next prime is 19380451. The reversal of 19380420 is 2408391.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11257 + ... + 12863.

It is an arithmetic number, because the mean of its divisors is an integer number (829192).

Almost surely, 2^19380420 is an apocalyptic number.

19380420 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 19380420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29850912).

19380420 is an abundant number, since it is smaller than the sum of its proper divisors (40321404).

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

19380420 is a wasteful number, since it uses less digits than its factorization.

19380420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1684 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 19380420 is about 4402.3198429919. The cubic root of 19380420 is about 268.6093101732.

The spelling of 19380420 in words is "nineteen million, three hundred eighty thousand, four hundred twenty".