20307748068 has 36 divisors (see below), whose sum is σ = 51342053308. Its totient is φ = 6768118080.

The previous prime is 20307748067. The next prime is 20307748081. The reversal of 20307748068 is 86084770302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3351020544 + 16956727524 = 57888^2 + 130218^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (20307748067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187230 + ... + 275082.

Almost surely, 2^20307748068 is an apocalyptic number.

It is an amenable number.

20307748068 is an abundant number, since it is smaller than the sum of its proper divisors (31034305240).

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

20307748068 is a wasteful number, since it uses less digits than its factorization.

20307748068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94284 (or 94279 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 20307748068 in words is "twenty billion, three hundred seven million, seven hundred forty-eight thousand, sixty-eight".