20081749892 has 24 divisors (see below), whose sum is σ = 35414800344. Its totient is φ = 9963299072.

The previous prime is 20081749879. The next prime is 20081749957. The reversal of 20081749892 is 29894718002.

It can be written as a sum of positive squares in 4 ways, for example, as 513656896 + 19568092996 = 22664^2 + 139886^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20081749892.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1548218 + ... + 1561134.

It is an arithmetic number, because the mean of its divisors is an integer number (1475616681).

Almost surely, 2^20081749892 is an apocalyptic number.

It is an amenable number.

20081749892 is a deficient number, since it is larger than the sum of its proper divisors (15333050452).

20081749892 is a wasteful number, since it uses less digits than its factorization.

20081749892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15895 (or 15893 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 20081749892 in words is "twenty billion, eighty-one million, seven hundred forty-nine thousand, eight hundred ninety-two".