20852725364464 has 160 divisors (see below), whose sum is σ = 50497612517376. Its totient is φ = 8134933524480.

The previous prime is 20852725364437. The next prime is 20852725364479. The reversal of 20852725364464 is 46446352725802.

It is a junction number, because it is equal to n+sod(n) for n = 20852725364399 and 20852725364408.

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, 98287042 + ... + 98498974.

Almost surely, 2^{20852725364464} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20852725364464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25248806258688).

20852725364464 is an abundant number, since it is smaller than the sum of its proper divisors (29644887152912).

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

20852725364464 is a wasteful number, since it uses less digits than its factorization.

20852725364464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213663 (or 213657 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 58.

The spelling of 20852725364464 in words is "twenty trillion, eight hundred fifty-two billion, seven hundred twenty-five million, three hundred sixty-four thousand, four hundred sixty-four".