19913380 has 12 divisors (see below), whose sum is σ = 41818140. Its totient is φ = 7965344.

The previous prime is 19913353. The next prime is 19913393. The reversal of 19913380 is 8331991.

It can be written as a sum of positive squares in 2 ways, for example, as 11009124 + 8904256 = 3318^2 + 2984^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497815 + ... + 497854.

It is an arithmetic number, because the mean of its divisors is an integer number (3484845).

Almost surely, 2^19913380 is an apocalyptic number.

19913380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19913380 is an abundant number, since it is smaller than the sum of its proper divisors (21904760).

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

19913380 is a wasteful number, since it uses less digits than its factorization.

19913380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995678 (or 995676 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 19913380 is about 4462.4410360250. The cubic root of 19913380 is about 271.0493231394.

The spelling of 19913380 in words is "nineteen million, nine hundred thirteen thousand, three hundred eighty".