20044331531 has 4 divisors (see below), whose sum is σ = 22907807472. Its totient is φ = 17180855592.

The previous prime is 20044331519. The next prime is 20044331551. The reversal of 20044331531 is 13513344002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20044331531 - 2¹⁰ = 20044330507 is a prime.

It is a super-2 number, since 2×20044331531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20044331531.

It is not an unprimeable number, because it can be changed into a prime (20044331551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1431737960 + ... + 1431737973.

It is an arithmetic number, because the mean of its divisors is an integer number (5726951868).

Almost surely, 2^20044331531 is an apocalyptic number.

20044331531 is a deficient number, since it is larger than the sum of its proper divisors (2863475941).

20044331531 is an equidigital number, since it uses as much as digits as its factorization.

20044331531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863475940.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 20044331531 its reverse (13513344002), we get a palindrome (33557675533).

The spelling of 20044331531 in words is "twenty billion, forty-four million, three hundred thirty-one thousand, five hundred thirty-one".