19880424 has 64 divisors (see below), whose sum is σ = 57024000. Its totient is φ = 6410880.

The previous prime is 19880417. The next prime is 19880431. The reversal of 19880424 is 42408891.

It is an interprime number because it is at equal distance from previous prime (19880417) and next prime (19880431).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5212 + ... + 8180.

It is an arithmetic number, because the mean of its divisors is an integer number (891000).

Almost surely, 2^19880424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19880424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28512000).

19880424 is an abundant number, since it is smaller than the sum of its proper divisors (37143576).

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

19880424 is a wasteful number, since it uses less digits than its factorization.

19880424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015 (or 3005 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 19880424 is about 4458.7469091663. The cubic root of 19880424 is about 270.8997146214.

The spelling of 19880424 in words is "nineteen million, eight hundred eighty thousand, four hundred twenty-four".