19421120 has 56 divisors (see below), whose sum is σ = 46689264. Its totient is φ = 7694336.

The previous prime is 19421113. The next prime is 19421141. The reversal of 19421120 is 2112491.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 19421092 and 19421101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43619 + ... + 44061.

Almost surely, 2^19421120 is an apocalyptic number.

19421120 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 19421120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23344632).

19421120 is an abundant number, since it is smaller than the sum of its proper divisors (27268144).

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

19421120 is a wasteful number, since it uses less digits than its factorization.

19421120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597 (or 587 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 19421120 is about 4406.9399814384. The cubic root of 19421120 is about 268.7972103830.

The spelling of 19421120 in words is "nineteen million, four hundred twenty-one thousand, one hundred twenty".