20173984512 has 72 divisors (see below), whose sum is σ = 58573354560. Its totient is φ = 6113326080.

The previous prime is 20173984499. The next prime is 20173984529. The reversal of 20173984512 is 21548937102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1185562 + ... + 1202457.

Almost surely, 2^20173984512 is an apocalyptic number.

20173984512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20173984512 is an abundant number, since it is smaller than the sum of its proper divisors (38399370048).

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

20173984512 is a wasteful number, since it uses less digits than its factorization.

20173984512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388049 (or 2388035 counting only the distinct ones).

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

The spelling of 20173984512 in words is "twenty billion, one hundred seventy-three million, nine hundred eighty-four thousand, five hundred twelve".