19355420 has 48 divisors (see below), whose sum is σ = 48480768. Its totient is φ = 6346560.

The previous prime is 19355419. The next prime is 19355437. The reversal of 19355420 is 2455391.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 215 + ... + 6225.

It is an arithmetic number, because the mean of its divisors is an integer number (1010016).

Almost surely, 2^19355420 is an apocalyptic number.

19355420 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 19355420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24240384).

19355420 is an abundant number, since it is smaller than the sum of its proper divisors (29125348).

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

19355420 is a wasteful number, since it uses less digits than its factorization.

19355420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6050 (or 6048 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 19355420 is about 4399.4795146699. The cubic root of 19355420 is about 268.4937618984.

Subtracting from 19355420 its sum of digits (29), we obtain a palindrome (19355391).

The spelling of 19355420 in words is "nineteen million, three hundred fifty-five thousand, four hundred twenty".