19593473640 has 128 divisors (see below), whose sum is σ = 63801077760. Its totient is φ = 4784984064.

The previous prime is 19593473561. The next prime is 19593473659. The reversal of 19593473640 is 4637439591.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148672 + ... + 247568.

It is an arithmetic number, because the mean of its divisors is an integer number (498445920).

Almost surely, 2^19593473640 is an apocalyptic number.

19593473640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19593473640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31900538880).

19593473640 is an abundant number, since it is smaller than the sum of its proper divisors (44207604120).

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

19593473640 is a wasteful number, since it uses less digits than its factorization.

19593473640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99051 (or 99047 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 51.

The spelling of 19593473640 in words is "nineteen billion, five hundred ninety-three million, four hundred seventy-three thousand, six hundred forty".