20109539558 has 8 divisors (see below), whose sum is σ = 30170617128. Its totient is φ = 10052667184.

The previous prime is 20109539533. The next prime is 20109539579. The reversal of 20109539558 is 85593590102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1039316 + ... + 1058487.

It is an arithmetic number, because the mean of its divisors is an integer number (3771327141).

Almost surely, 2^20109539558 is an apocalyptic number.

20109539558 is a deficient number, since it is larger than the sum of its proper divisors (10061077570).

20109539558 is a wasteful number, since it uses less digits than its factorization.

20109539558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102598.

The product of its (nonzero) digits is 486000, while the sum is 47.

The spelling of 20109539558 in words is "twenty billion, one hundred nine million, five hundred thirty-nine thousand, five hundred fifty-eight".