20901159912 has 64 divisors (see below), whose sum is σ = 55199131200. Its totient is φ = 6576837120.

The previous prime is 20901159911. The next prime is 20901159943. The reversal of 20901159912 is 21995110902.

It is not an unprimeable number, because it can be changed into a prime (20901159911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46578 + ... + 209694.

It is an arithmetic number, because the mean of its divisors is an integer number (862486425).

Almost surely, 2^20901159912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20901159912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27599565600).

20901159912 is an abundant number, since it is smaller than the sum of its proper divisors (34297971288).

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

20901159912 is a wasteful number, since it uses less digits than its factorization.

20901159912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163426 (or 163422 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 39.

The spelling of 20901159912 in words is "twenty billion, nine hundred one million, one hundred fifty-nine thousand, nine hundred twelve".