20301136536 has 64 divisors (see below), whose sum is σ = 52194067200. Its totient is φ = 6577271168.

The previous prime is 20301136529. The next prime is 20301136547. The reversal of 20301136536 is 63563110302.

It is a happy number.

It is a super-2 number, since 2×20301136536² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61525 + ... + 210683.

It is an arithmetic number, because the mean of its divisors is an integer number (815532300).

Almost surely, 2^20301136536 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 20301136536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26097033600).

20301136536 is an abundant number, since it is smaller than the sum of its proper divisors (31892930664).

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

20301136536 is a wasteful number, since it uses less digits than its factorization.

20301136536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149328 (or 149324 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

Adding to 20301136536 its reverse (63563110302), we get a palindrome (83864246838).

The spelling of 20301136536 in words is "twenty billion, three hundred one million, one hundred thirty-six thousand, five hundred thirty-six".