20308782722 has 6 divisors (see below), whose sum is σ = 30463476393. Its totient is φ = 10154290592.

The previous prime is 20308782701. The next prime is 20308782731. The reversal of 20308782722 is 22728780302.

It can be written as a sum of positive squares in 2 ways, for example, as 19310159521 + 998623201 = 138961^2 + 31601^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=100769.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20308782722.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 151154 + ... + 251922.

Almost surely, 2^20308782722 is an apocalyptic number.

20308782722 is a deficient number, since it is larger than the sum of its proper divisors (10154693671).

20308782722 is an frugal number, since it uses more digits than its factorization.

20308782722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201540 (or 100771 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 41.

The spelling of 20308782722 in words is "twenty billion, three hundred eight million, seven hundred eighty-two thousand, seven hundred twenty-two".