19500571040 has 24 divisors (see below), whose sum is σ = 46070099460. Its totient is φ = 7800228352.

The previous prime is 19500571039. The next prime is 19500571043. The reversal of 19500571040 is 4017500591.

It can be written as a sum of positive squares in 2 ways, for example, as 19408947856 + 91623184 = 139316^2 + 9572^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 19500570988 and 19500571006.

It is not an unprimeable number, because it can be changed into a prime (19500571043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60939125 + ... + 60939444.

Almost surely, 2^19500571040 is an apocalyptic number.

19500571040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19500571040 is an abundant number, since it is smaller than the sum of its proper divisors (26569528420).

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

19500571040 is a wasteful number, since it uses less digits than its factorization.

19500571040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121878584 (or 121878576 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 32.

The spelling of 19500571040 in words is "nineteen billion, five hundred million, five hundred seventy-one thousand, forty".