20109189634 has 8 divisors (see below), whose sum is σ = 30164703228. Its totient is φ = 10054288560.

The previous prime is 20109189629. The next prime is 20109189643. The reversal of 20109189634 is 43698190102.

It is a happy number.

20109189634 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 19609801225 + 499388409 = 140035^2 + 22347^2 .

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

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, 59637 + ... + 209224.

Almost surely, 2^20109189634 is an apocalyptic number.

20109189634 is a deficient number, since it is larger than the sum of its proper divisors (10055513594).

20109189634 is a wasteful number, since it uses less digits than its factorization.

20109189634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306260.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 20109189634 in words is "twenty billion, one hundred nine million, one hundred eighty-nine thousand, six hundred thirty-four".