20023312032 has 144 divisors (see below), whose sum is σ = 62544605760. Its totient is φ = 6048193536.

The previous prime is 20023312031. The next prime is 20023312039. The reversal of 20023312032 is 23021332002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a junction number, because it is equal to n+sod(n) for n = 20023311996 and 20023312014.

It is not an unprimeable number, because it can be changed into a prime (20023312031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46308 + ... + 205404.

It is an arithmetic number, because the mean of its divisors is an integer number (434337540).

Almost surely, 2^20023312032 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 20023312032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31272302880).

20023312032 is an abundant number, since it is smaller than the sum of its proper divisors (42521293728).

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

20023312032 is a wasteful number, since it uses less digits than its factorization.

20023312032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159155 (or 159144 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20023312032 its reverse (23021332002), we get a palindrome (43044644034).

The spelling of 20023312032 in words is "twenty billion, twenty-three million, three hundred twelve thousand, thirty-two".