20762585805605 has 16 divisors (see below), whose sum is σ = 28496459535744. Its totient is φ = 14226173622720.

The previous prime is 20762585805589. The next prime is 20762585805607. The reversal of 20762585805605 is 50650858526702.

It is not a de Polignac number, because 20762585805605 - 2⁴ = 20762585805589 is a prime.

It is a super-2 number, since 2×20762585805605² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20762585805607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229705682 + ... + 229796051.

It is an arithmetic number, because the mean of its divisors is an integer number (1781028720984).

Almost surely, 2^{20762585805605} is an apocalyptic number.

It is an amenable number.

20762585805605 is a deficient number, since it is larger than the sum of its proper divisors (7733873730139).

20762585805605 is a wasteful number, since it uses less digits than its factorization.

20762585805605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459503036.

The product of its (nonzero) digits is 40320000, while the sum is 59.

The spelling of 20762585805605 in words is "twenty trillion, seven hundred sixty-two billion, five hundred eighty-five million, eight hundred five thousand, six hundred five".