19315487220 has 24 divisors (see below), whose sum is σ = 54083364384. Its totient is φ = 5150796576.

The previous prime is 19315487203. The next prime is 19315487221. The reversal of 19315487220 is 2278451391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19315487221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160962334 + ... + 160962453.

It is an arithmetic number, because the mean of its divisors is an integer number (2253473516).

Almost surely, 2^19315487220 is an apocalyptic number.

19315487220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19315487220 is an abundant number, since it is smaller than the sum of its proper divisors (34767877164).

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

19315487220 is a wasteful number, since it uses less digits than its factorization.

19315487220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321924799 (or 321924797 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 19315487220 in words is "nineteen billion, three hundred fifteen million, four hundred eighty-seven thousand, two hundred twenty".