20986639350 has 48 divisors (see below), whose sum is σ = 52119521280. Its totient is φ = 5588624800.

The previous prime is 20986639343. The next prime is 20986639361. The reversal of 20986639350 is 5393668902.

It is a junction number, because it is equal to n+sod(n) for n = 20986639293 and 20986639302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10555 + ... + 205145.

It is an arithmetic number, because the mean of its divisors is an integer number (1085823360).

Almost surely, 2^20986639350 is an apocalyptic number.

20986639350 is an abundant number, since it is smaller than the sum of its proper divisors (31132881930).

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

20986639350 is a wasteful number, since it uses less digits than its factorization.

20986639350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195325 (or 195320 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 51.

The spelling of 20986639350 in words is "twenty billion, nine hundred eighty-six million, six hundred thirty-nine thousand, three hundred fifty".