20109644626 has 16 divisors (see below), whose sum is σ = 30211374528. Its totient is φ = 10039201200.

The previous prime is 20109644549. The next prime is 20109644647. The reversal of 20109644626 is 62644690102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4717336 + ... + 4721596.

It is an arithmetic number, because the mean of its divisors is an integer number (1888210908).

Almost surely, 2^20109644626 is an apocalyptic number.

20109644626 is a deficient number, since it is larger than the sum of its proper divisors (10101729902).

20109644626 is a wasteful number, since it uses less digits than its factorization.

20109644626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7377.

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 20109644626 in words is "twenty billion, one hundred nine million, six hundred forty-four thousand, six hundred twenty-six".