20680920396 has 36 divisors (see below), whose sum is σ = 54549676272. Its totient is φ = 6593916384.

The previous prime is 20680920389. The next prime is 20680920433. The reversal of 20680920396 is 69302908602.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 12487651 + ... + 12489306.

Almost surely, 2^20680920396 is an apocalyptic number.

It is an amenable number.

20680920396 is an abundant number, since it is smaller than the sum of its proper divisors (33868755876).

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

20680920396 is a wasteful number, since it uses less digits than its factorization.

20680920396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24976990 (or 24976985 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 20680920396 in words is "twenty billion, six hundred eighty million, nine hundred twenty thousand, three hundred ninety-six".