20431330000 has 100 divisors (see below), whose sum is σ = 49719709600. Its totient is φ = 8130672000.

The previous prime is 20431329973. The next prime is 20431330001. The reversal of 20431330000 is 3313402.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431330001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1984867 + ... + 1995133.

It is an arithmetic number, because the mean of its divisors is an integer number (497197096).

Almost surely, 2^20431330000 is an apocalyptic number.

20431330000 is a gapful number since it is divisible by the number (20) 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 20431330000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24859854800).

20431330000 is an abundant number, since it is smaller than the sum of its proper divisors (29288379600).

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

20431330000 is a wasteful number, since it uses less digits than its factorization.

20431330000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10494 (or 10473 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 20431330000 its reverse (3313402), we get a palindrome (20434643402).

The spelling of 20431330000 in words is "twenty billion, four hundred thirty-one million, three hundred thirty thousand".