20517050358 has 112 divisors (see below), whose sum is σ = 53961532416. Its totient is φ = 5725566000.

The previous prime is 20517050329. The next prime is 20517050371. The reversal of 20517050358 is 85305071502.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 415483 + ... + 462233.

Almost surely, 2^20517050358 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20517050358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26980766208).

20517050358 is an abundant number, since it is smaller than the sum of its proper divisors (33444482058).

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

20517050358 is an equidigital number, since it uses as much as digits as its factorization.

20517050358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46821 (or 46806 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 20517050358 in words is "twenty billion, five hundred seventeen million, fifty thousand, three hundred fifty-eight".