19834240 has 64 divisors (see below), whose sum is σ = 50232960. Its totient is φ = 7462912.

The previous prime is 19834237. The next prime is 19834249. The reversal of 19834240 is 4243891.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19834249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9969 + ... + 11791.

It is an arithmetic number, because the mean of its divisors is an integer number (784890).

Almost surely, 2^19834240 is an apocalyptic number.

19834240 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 19834240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25116480).

19834240 is an abundant number, since it is smaller than the sum of its proper divisors (30398720).

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

19834240 is a wasteful number, since it uses less digits than its factorization.

19834240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1859 (or 1847 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 19834240 is about 4453.5648642408. The cubic root of 19834240 is about 270.6897772281.

The spelling of 19834240 in words is "nineteen million, eight hundred thirty-four thousand, two hundred forty".