19315873920 has 128 divisors (see below), whose sum is σ = 70365018240. Its totient is φ = 4415053824.

The previous prime is 19315873901. The next prime is 19315873921. The reversal of 19315873920 is 2937851391.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 19315873920.

It is not an unprimeable number, because it can be changed into a prime (19315873921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 705157 + ... + 732036.

It is an arithmetic number, because the mean of its divisors is an integer number (549726705).

Almost surely, 2^19315873920 is an apocalyptic number.

19315873920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19315873920 is an abundant number, since it is smaller than the sum of its proper divisors (51049144320).

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

19315873920 is a wasteful number, since it uses less digits than its factorization.

19315873920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437222 (or 1437210 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 19315873920 in words is "nineteen billion, three hundred fifteen million, eight hundred seventy-three thousand, nine hundred twenty".