19934838 has 96 divisors (see below), whose sum is σ = 56759040. Its totient is φ = 4898880.

The previous prime is 19934833. The next prime is 19934839. The reversal of 19934838 is 83843991.

It is a junction number, because it is equal to n+sod(n) for n = 19934793 and 19934802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19934833) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25956 + ... + 26712.

It is an arithmetic number, because the mean of its divisors is an integer number (591240).

Almost surely, 2^19934838 is an apocalyptic number.

19934838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19934838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28379520).

19934838 is an abundant number, since it is smaller than the sum of its proper divisors (36824202).

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

19934838 is a wasteful number, since it uses less digits than its factorization.

19934838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802 (or 799 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 19934838 is about 4464.8446781495. The cubic root of 19934838 is about 271.1466461205.

The spelling of 19934838 in words is "nineteen million, nine hundred thirty-four thousand, eight hundred thirty-eight".