20431843600 has 135 divisors (see below), whose sum is σ = 57157772751. Its totient is φ = 6998342400.

The previous prime is 20431843589. The next prime is 20431843603. The reversal of 20431843600 is 634813402.

The square root of 20431843600 is 142940.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 71978256 + 20359865344 = 8484^2 + 142688^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20431843603) 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 26 ways as a sum of consecutive naturals, for example, 20011090 + ... + 20012110.

Almost surely, 2^20431843600 is an apocalyptic number.

20431843600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

20431843600 is the 142940-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20431843600

20431843600 is an abundant number, since it is smaller than the sum of its proper divisors (36725929151).

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

20431843600 is an equidigital number, since it uses as much as digits as its factorization.

20431843600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074 (or 1035 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 20431843600 in words is "twenty billion, four hundred thirty-one million, eight hundred forty-three thousand, six hundred".