19930880 has 72 divisors (see below), whose sum is σ = 49889952. Its totient is φ = 7614464.

The previous prime is 19930877. The next prime is 19930891. The reversal of 19930880 is 8803991.

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, 29102 + ... + 29778.

It is an arithmetic number, because the mean of its divisors is an integer number (692916).

Almost surely, 2^19930880 is an apocalyptic number.

19930880 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 19930880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24944976).

19930880 is an abundant number, since it is smaller than the sum of its proper divisors (29959072).

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

19930880 is an equidigital number, since it uses as much as digits as its factorization.

19930880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 19930880 is about 4464.4014156435. The cubic root of 19930880 is about 271.1286998254.

The spelling of 19930880 in words is "nineteen million, nine hundred thirty thousand, eight hundred eighty".