20013212232 has 96 divisors (see below), whose sum is σ = 58594536000. Its totient is φ = 6134421888.

The previous prime is 20013212231. The next prime is 20013212257. The reversal of 20013212232 is 23221231002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20013212231) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 205519 + ... + 286817.

It is an arithmetic number, because the mean of its divisors is an integer number (610359750).

Almost surely, 2^20013212232 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 20013212232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29297268000).

20013212232 is an abundant number, since it is smaller than the sum of its proper divisors (38581323768).

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

20013212232 is a wasteful number, since it uses less digits than its factorization.

20013212232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81587 (or 81580 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20013212232 its reverse (23221231002), we get a palindrome (43234443234).

The spelling of 20013212232 in words is "twenty billion, thirteen million, two hundred twelve thousand, two hundred thirty-two".