20631023232 has 128 divisors (see below), whose sum is σ = 58499366400. Its totient is φ = 6423137280.

The previous prime is 20631023219. The next prime is 20631023333. The reversal of 20631023232 is 23232013602.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 498103 + ... + 537929.

It is an arithmetic number, because the mean of its divisors is an integer number (457026300).

Almost surely, 2^20631023232 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 20631023232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29249683200).

20631023232 is an abundant number, since it is smaller than the sum of its proper divisors (37868343168).

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

20631023232 is a wasteful number, since it uses less digits than its factorization.

20631023232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39934 (or 39922 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 20631023232 its reverse (23232013602), we get a palindrome (43863036834).

The spelling of 20631023232 in words is "twenty billion, six hundred thirty-one million, twenty-three thousand, two hundred thirty-two".