20587985112 has 128 divisors (see below), whose sum is σ = 53662095360. Its totient is φ = 6575247360.

The previous prime is 20587985111. The next prime is 20587985129. The reversal of 20587985112 is 21158978502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20587985111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58322728 + ... + 58323080.

It is an arithmetic number, because the mean of its divisors is an integer number (419235120).

Almost surely, 2^20587985112 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 20587985112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26831047680).

20587985112 is an abundant number, since it is smaller than the sum of its proper divisors (33074110248).

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

20587985112 is a wasteful number, since it uses less digits than its factorization.

20587985112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 48.

The spelling of 20587985112 in words is "twenty billion, five hundred eighty-seven million, nine hundred eighty-five thousand, one hundred twelve".