20499999999996 has 48 divisors (see below), whose sum is σ = 53981191232640. Its totient is φ = 5997910134720.

The previous prime is 20499999999977. The next prime is 20500000000001. The reversal of 20499999999996 is 69999999999402.

It is a self number, because there is not a number n which added to its sum of digits gives 20499999999996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2677634626 + ... + 2677642281.

It is an arithmetic number, because the mean of its divisors is an integer number (1124608150680).

Almost surely, 2^{20499999999996} is an apocalyptic number.

It is an amenable number.

20499999999996 is an abundant number, since it is smaller than the sum of its proper divisors (33481191232644).

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

20499999999996 is a wasteful number, since it uses less digits than its factorization.

20499999999996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355276954 (or 5355276952 counting only the distinct ones).

The product of its (nonzero) digits is 167365651248, while the sum is 102.

The spelling of 20499999999996 in words is "twenty trillion, four hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-six".