20081936772 has 96 divisors (see below), whose sum is σ = 54298711040. Its totient is φ = 6411156480.

The previous prime is 20081936767. The next prime is 20081936839. The reversal of 20081936772 is 27763918002.

20081936772 is a `hidden beast` number, since 200 + 8 + 19 + 367 + 72 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 293838 + ... + 355674.

Almost surely, 2^20081936772 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 20081936772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27149355520).

20081936772 is an abundant number, since it is smaller than the sum of its proper divisors (34216774268).

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

20081936772 is a wasteful number, since it uses less digits than its factorization.

20081936772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61978 (or 61970 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 20081936772 in words is "twenty billion, eighty-one million, nine hundred thirty-six thousand, seven hundred seventy-two".