20825019868 has 6 divisors (see below), whose sum is σ = 36443784776. Its totient is φ = 10412509932.

The previous prime is 20825019811. The next prime is 20825019883. The reversal of 20825019868 is 86891052802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2603127480 + ... + 2603127487.

Almost surely, 2^20825019868 is an apocalyptic number.

It is an amenable number.

20825019868 is a deficient number, since it is larger than the sum of its proper divisors (15618764908).

20825019868 is a wasteful number, since it uses less digits than its factorization.

20825019868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5206254971 (or 5206254969 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 49.

The spelling of 20825019868 in words is "twenty billion, eight hundred twenty-five million, nineteen thousand, eight hundred sixty-eight".