19019490 has 96 divisors (see below), whose sum is σ = 54601344. Its totient is φ = 4151040.

The previous prime is 19019489. The next prime is 19019503. The reversal of 19019490 is 9491091.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 404647 + ... + 404693.

It is an arithmetic number, because the mean of its divisors is an integer number (568764).

Almost surely, 2^19019490 is an apocalyptic number.

19019490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19019490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27300672).

19019490 is an abundant number, since it is smaller than the sum of its proper divisors (35581854).

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

19019490 is a wasteful number, since it uses less digits than its factorization.

19019490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 19019490 is about 4361.1340268329. The cubic root of 19019490 is about 266.9313743028.

The spelling of 19019490 in words is "nineteen million, nineteen thousand, four hundred ninety".