20866729152 has 112 divisors (see below), whose sum is σ = 58714904160. Its totient is φ = 6517604352.

The previous prime is 20866729127. The next prime is 20866729183. The reversal of 20866729152 is 25192766802.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733498 + ... + 761414.

Almost surely, 2^20866729152 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 20866729152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29357452080).

20866729152 is an abundant number, since it is smaller than the sum of its proper divisors (37848175008).

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

20866729152 is a wasteful number, since it uses less digits than its factorization.

20866729152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28178 (or 28168 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 20866729152 in words is "twenty billion, eight hundred sixty-six million, seven hundred twenty-nine thousand, one hundred fifty-two".