20000109797728 has 24 divisors (see below), whose sum is σ = 39375380493792. Its totient is φ = 10000013164416.

The previous prime is 20000109797719. The next prime is 20000109797743. The reversal of 20000109797728 is 82779790100002.

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, 7370926 + ... + 9712402.

It is an arithmetic number, because the mean of its divisors is an integer number (1640640853908).

Almost surely, 2^{20000109797728} is an apocalyptic number.

It is an amenable number.

20000109797728 is a deficient number, since it is larger than the sum of its proper divisors (19375270696064).

20000109797728 is a wasteful number, since it uses less digits than its factorization.

20000109797728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608414 (or 2608406 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 52.

The spelling of 20000109797728 in words is "twenty trillion, one hundred nine million, seven hundred ninety-seven thousand, seven hundred twenty-eight".