20648940712 has 32 divisors (see below), whose sum is σ = 38805972480. Its totient is φ = 10300716160.

The previous prime is 20648940709. The next prime is 20648940749. The reversal of 20648940712 is 21704984602.

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 in 7 ways as a sum of consecutive naturals, for example, 9780537 + ... + 9782647.

It is an arithmetic number, because the mean of its divisors is an integer number (1212686640).

Almost surely, 2^20648940712 is an apocalyptic number.

It is an amenable number.

20648940712 is a deficient number, since it is larger than the sum of its proper divisors (18157031768).

20648940712 is a wasteful number, since it uses less digits than its factorization.

20648940712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4353 (or 4349 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 20648940712 in words is "twenty billion, six hundred forty-eight million, nine hundred forty thousand, seven hundred twelve".