20508691057712 has 80 divisors (see below), whose sum is σ = 46684728132000. Its totient is φ = 8604610560000.

The previous prime is 20508691057639. The next prime is 20508691057721. The reversal of 20508691057712 is 21775019680502.

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, 47257712 + ... + 47689712.

It is an arithmetic number, because the mean of its divisors is an integer number (583559101650).

Almost surely, 2^{20508691057712} is an apocalyptic number.

20508691057712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20508691057712 is an abundant number, since it is smaller than the sum of its proper divisors (26176037074288).

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

20508691057712 is a wasteful number, since it uses less digits than its factorization.

20508691057712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452782 (or 452776 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 53.

The spelling of 20508691057712 in words is "twenty trillion, five hundred eight billion, six hundred ninety-one million, fifty-seven thousand, seven hundred twelve".