20545823836 has 24 divisors (see below), whose sum is σ = 37986419520. Its totient is φ = 9707635392.

The previous prime is 20545823833. The next prime is 20545823839. The reversal of 20545823836 is 63832854502.

It is an interprime number because it is at equal distance from previous prime (20545823833) and next prime (20545823839).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545823833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1878795 + ... + 1889698.

It is an arithmetic number, because the mean of its divisors is an integer number (1582767480).

Almost surely, 2^20545823836 is an apocalyptic number.

It is an amenable number.

20545823836 is a deficient number, since it is larger than the sum of its proper divisors (17440595684).

20545823836 is a wasteful number, since it uses less digits than its factorization.

20545823836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3768573 (or 3768571 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 46.

The spelling of 20545823836 in words is "twenty billion, five hundred forty-five million, eight hundred twenty-three thousand, eight hundred thirty-six".