19793340 has 144 divisors (see below), whose sum is σ = 71705088. Its totient is φ = 4321152.

The previous prime is 19793339. The next prime is 19793353. The reversal of 19793340 is 4339791.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 19793295 and 19793304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28639 + ... + 29321.

It is an arithmetic number, because the mean of its divisors is an integer number (497952).

Almost surely, 2^19793340 is an apocalyptic number.

19793340 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 19793340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35852544).

19793340 is an abundant number, since it is smaller than the sum of its proper divisors (51911748).

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

19793340 is a wasteful number, since it uses less digits than its factorization.

19793340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 723 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 19793340 is about 4448.9706674690. The cubic root of 19793340 is about 270.5035869066.

The spelling of 19793340 in words is "nineteen million, seven hundred ninety-three thousand, three hundred forty".