19315320520 has 32 divisors (see below), whose sum is σ = 43844078520. Its totient is φ = 7657753600.

The previous prime is 19315320511. The next prime is 19315320527. The reversal of 19315320520 is 2502351391.

It can be written as a sum of positive squares in 4 ways, for example, as 9218688196 + 10096632324 = 96014^2 + 100482^2 .

It is not an unprimeable number, because it can be changed into a prime (19315320527) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2132131 + ... + 2141170.

Almost surely, 2^19315320520 is an apocalyptic number.

19315320520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19315320520 is an abundant number, since it is smaller than the sum of its proper divisors (24528758000).

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

19315320520 is a wasteful number, since it uses less digits than its factorization.

19315320520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4273425 (or 4273421 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The spelling of 19315320520 in words is "nineteen billion, three hundred fifteen million, three hundred twenty thousand, five hundred twenty".