19421190 has 48 divisors (see below), whose sum is σ = 52131456. Its totient is φ = 5011200.

The previous prime is 19421183. The next prime is 19421203. The reversal of 19421190 is 9112491.

It is a super-2 number, since 2×19421190² = 754365242032200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 691 + ... + 6270.

It is an arithmetic number, because the mean of its divisors is an integer number (1086072).

Almost surely, 2^19421190 is an apocalyptic number.

19421190 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 19421190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26065728).

19421190 is an abundant number, since it is smaller than the sum of its proper divisors (32710266).

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

19421190 is a wasteful number, since it uses less digits than its factorization.

19421190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7005 (or 7002 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 19421190 is about 4406.9479234500. The cubic root of 19421190 is about 268.7975333266.

The spelling of 19421190 in words is "nineteen million, four hundred twenty-one thousand, one hundred ninety".