20385212612 has 12 divisors (see below), whose sum is σ = 35682481296. Its totient is φ = 10190217960.

The previous prime is 20385212611. The next prime is 20385212633. The reversal of 20385212612 is 21621258302.

It is not an unprimeable number, because it can be changed into a prime (20385212611) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 577814 + ... + 612077.

It is an arithmetic number, because the mean of its divisors is an integer number (2973540108).

Almost surely, 2^20385212612 is an apocalyptic number.

It is an amenable number.

20385212612 is a deficient number, since it is larger than the sum of its proper divisors (15297268684).

20385212612 is a wasteful number, since it uses less digits than its factorization.

20385212612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194178 (or 1194176 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 20385212612 in words is "twenty billion, three hundred eighty-five million, two hundred twelve thousand, six hundred twelve".