20261136852 has 144 divisors (see below), whose sum is σ = 58423520064. Its totient is φ = 6139346400.

The previous prime is 20261136811. The next prime is 20261136859. The reversal of 20261136852 is 25863116202.

20261136852 is a `hidden beast` number, since 2 + 0 + 2 + 611 + 36 + 8 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261136859) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1285902 + ... + 1301562.

Almost surely, 2^20261136852 is an apocalyptic number.

20261136852 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20261136852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29211760032).

20261136852 is an abundant number, since it is smaller than the sum of its proper divisors (38162383212).

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

20261136852 is a wasteful number, since it uses less digits than its factorization.

20261136852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15713 (or 15677 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 20261136852 in words is "twenty billion, two hundred sixty-one million, one hundred thirty-six thousand, eight hundred fifty-two".