19520040 has 64 divisors (see below), whose sum is σ = 59823360. Its totient is φ = 5093120.

The previous prime is 19520021. The next prime is 19520057. The reversal of 19520040 is 4002591.

It is a junction number, because it is equal to n+sod(n) for n = 19519989 and 19520016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3910 + ... + 7370.

It is an arithmetic number, because the mean of its divisors is an integer number (934740).

Almost surely, 2^19520040 is an apocalyptic number.

19520040 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 19520040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29911680).

19520040 is an abundant number, since it is smaller than the sum of its proper divisors (40303320).

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

19520040 is a wasteful number, since it uses less digits than its factorization.

19520040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522 (or 3518 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 19520040 is about 4418.1489336599. The cubic root of 19520040 is about 269.2528038062.

The spelling of 19520040 in words is "nineteen million, five hundred twenty thousand, forty".