20212011136 has 64 divisors (see below), whose sum is σ = 41167795680. Its totient is φ = 9881929728.

The previous prime is 20212011041. The next prime is 20212011137. The reversal of 20212011136 is 63111021202.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (20212011137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1166311 + ... + 1183513.

Almost surely, 2^20212011136 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 20212011136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20583897840).

20212011136 is an abundant number, since it is smaller than the sum of its proper divisors (20955784544).

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

20212011136 is a wasteful number, since it uses less digits than its factorization.

20212011136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17421 (or 17409 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20212011136 its reverse (63111021202), we get a palindrome (83323032338).

The spelling of 20212011136 in words is "twenty billion, two hundred twelve million, eleven thousand, one hundred thirty-six".