19010420 has 144 divisors (see below), whose sum is σ = 51988608. Its totient is φ = 5744640.

The previous prime is 19010413. The next prime is 19010423. The reversal of 19010420 is 2401091.

It is a happy number.

It is a super-2 number, since 2×19010420² = 722792137152800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19010423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 826529 + ... + 826551.

It is an arithmetic number, because the mean of its divisors is an integer number (361032).

Almost surely, 2^19010420 is an apocalyptic number.

19010420 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 19010420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25994304).

19010420 is an abundant number, since it is smaller than the sum of its proper divisors (32978188).

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

19010420 is a wasteful number, since it uses less digits than its factorization.

19010420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 19010420 is about 4360.0940356832. The cubic root of 19010420 is about 266.8889362122. Note that the first 3 decimals are identical.

19010420 divided by its sum of digits (17) gives a triangular number (1118260 = T₁₄₉₅).

The spelling of 19010420 in words is "nineteen million, ten thousand, four hundred twenty".