20758985209912 has 32 divisors (see below), whose sum is σ = 40935212236800. Its totient is φ = 9850035422304.

The previous prime is 20758985209847. The next prime is 20758985209913. The reversal of 20758985209912 is 21990258985702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20758985209913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444152112 + ... + 444198847.

It is an arithmetic number, because the mean of its divisors is an integer number (1279225382400).

Almost surely, 2^{20758985209912} is an apocalyptic number.

It is an amenable number.

20758985209912 is a deficient number, since it is larger than the sum of its proper divisors (20176227026888).

20758985209912 is a wasteful number, since it uses less digits than its factorization.

20758985209912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888351115 (or 888351111 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 67.

The spelling of 20758985209912 in words is "twenty trillion, seven hundred fifty-eight billion, nine hundred eighty-five million, two hundred nine thousand, nine hundred twelve".