20229436136 has 128 divisors (see below), whose sum is σ = 48691292160. Its totient is φ = 7664025600.

The previous prime is 20229436133. The next prime is 20229436163. The reversal of 20229436136 is 63163492202.

It is a super-2 number, since 2×20229436136² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20229436136.

It is not an unprimeable number, because it can be changed into a prime (20229436133) 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, 2184476 + ... + 2193716.

It is an arithmetic number, because the mean of its divisors is an integer number (380400720).

Almost surely, 2^20229436136 is an apocalyptic number.

20229436136 is a gapful number since it is divisible by the number (26) 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 20229436136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24345646080).

20229436136 is an abundant number, since it is smaller than the sum of its proper divisors (28461856024).

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

20229436136 is a wasteful number, since it uses less digits than its factorization.

20229436136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9395 (or 9391 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The spelling of 20229436136 in words is "twenty billion, two hundred twenty-nine million, four hundred thirty-six thousand, one hundred thirty-six".