20173239486 has 32 divisors (see below), whose sum is σ = 44844936480. Its totient is φ = 6722085888.

The previous prime is 20173239479. The next prime is 20173239497. The reversal of 20173239486 is 68493237102.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 96510 + ... + 222846.

It is an arithmetic number, because the mean of its divisors is an integer number (1401404265).

Almost surely, 2^20173239486 is an apocalyptic number.

20173239486 is an abundant number, since it is smaller than the sum of its proper divisors (24671696994).

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

20173239486 is a wasteful number, since it uses less digits than its factorization.

20173239486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129305 (or 129299 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 20173239486 in words is "twenty billion, one hundred seventy-three million, two hundred thirty-nine thousand, four hundred eighty-six".