20765990349468 has 120 divisors (see below), whose sum is σ = 66814031722592. Its totient is φ = 5476744699776.

The previous prime is 20765990349449. The next prime is 20765990349491. The reversal of 20765990349468 is 86494309956702.

20765990349468 is a `hidden beast` number, since 2 + 0 + 76 + 5 + 9 + 9 + 0 + 3 + 494 + 68 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20765990349396 and 20765990349405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 352127455 + ... + 352186422.

Almost surely, 2^{20765990349468} is an apocalyptic number.

20765990349468 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20765990349468 is an abundant number, since it is smaller than the sum of its proper divisors (46048041373124).

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

20765990349468 is a wasteful number, since it uses less digits than its factorization.

20765990349468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704313913 (or 704313902 counting only the distinct ones).

The product of its (nonzero) digits is 705438720, while the sum is 72.

The spelling of 20765990349468 in words is "twenty trillion, seven hundred sixty-five billion, nine hundred ninety million, three hundred forty-nine thousand, four hundred sixty-eight".