19125530920 has 16 divisors (see below), whose sum is σ = 43032444660. Its totient is φ = 7650212352.

The previous prime is 19125530909. The next prime is 19125530933. The reversal of 19125530920 is 2903552191.

It can be written as a sum of positive squares in 2 ways, for example, as 15998708196 + 3126822724 = 126486^2 + 55918^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19125530920.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239069097 + ... + 239069176.

Almost surely, 2^19125530920 is an apocalyptic number.

19125530920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19125530920 is an abundant number, since it is smaller than the sum of its proper divisors (23906913740).

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

19125530920 is a wasteful number, since it uses less digits than its factorization.

19125530920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478138284 (or 478138280 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 37.

The spelling of 19125530920 in words is "nineteen billion, one hundred twenty-five million, five hundred thirty thousand, nine hundred twenty".