20090280868 has 36 divisors (see below), whose sum is σ = 42003440220. Its totient is φ = 8377411392.

The previous prime is 20090280863. The next prime is 20090280869. The reversal of 20090280868 is 86808209002.

It can be written as a sum of positive squares in 2 ways, for example, as 11521446244 + 8568834624 = 107338^2 + 92568^2 .

It is not an unprimeable number, because it can be changed into a prime (20090280863) 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, 1377903 + ... + 1392406.

Almost surely, 2^20090280868 is an apocalyptic number.

20090280868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20090280868 is an abundant number, since it is smaller than the sum of its proper divisors (21913159352).

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

20090280868 is a wasteful number, since it uses less digits than its factorization.

20090280868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770364 (or 2770355 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 20090280868 in words is "twenty billion, ninety million, two hundred eighty thousand, eight hundred sixty-eight".