20858435712636 has 96 divisors (see below), whose sum is σ = 50407483714560. Its totient is φ = 6705125312256.

The previous prime is 20858435712529. The next prime is 20858435712671. The reversal of 20858435712636 is 63621753485802.

It is a self number, because there is not a number n which added to its sum of digits gives 20858435712636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2369464611 + ... + 2369473413.

It is an arithmetic number, because the mean of its divisors is an integer number (525077955360).

Almost surely, 2^{20858435712636} is an apocalyptic number.

It is an amenable number.

20858435712636 is an abundant number, since it is smaller than the sum of its proper divisors (29549048001924).

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

20858435712636 is a wasteful number, since it uses less digits than its factorization.

20858435712636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16115 (or 16113 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 60.

The spelling of 20858435712636 in words is "twenty trillion, eight hundred fifty-eight billion, four hundred thirty-five million, seven hundred twelve thousand, six hundred thirty-six".