19894080 has 224 divisors, whose sum is σ = 71103744. Its totient is φ = 4685824.

The previous prime is 19894073. The next prime is 19894111. The reversal of 19894080 is 8049891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 375334 + ... + 375386.

Almost surely, 2^19894080 is an apocalyptic number.

19894080 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 19894080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35551872).

19894080 is an abundant number, since it is smaller than the sum of its proper divisors (51209664).

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

19894080 is a wasteful number, since it uses less digits than its factorization.

19894080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 19894080 is about 4460.2780182406. The cubic root of 19894080 is about 270.9617280503.

The spelling of 19894080 in words is "nineteen million, eight hundred ninety-four thousand, eighty".