20003345531 has 8 divisors (see below), whose sum is σ = 21845474784. Its totient is φ = 18204560640.

The previous prime is 20003345519. The next prime is 20003345581. The reversal of 20003345531 is 13554330002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20003345531 - 2¹⁴ = 20003329147 is a prime.

It is a super-2 number, since 2×20003345531² (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 20003345531.

It is not an unprimeable number, because it can be changed into a prime (20003345581) 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 7 ways as a sum of consecutive naturals, for example, 10835126 + ... + 10836971.

It is an arithmetic number, because the mean of its divisors is an integer number (2730684348).

Almost surely, 2^20003345531 is an apocalyptic number.

20003345531 is a deficient number, since it is larger than the sum of its proper divisors (1842129253).

20003345531 is a wasteful number, since it uses less digits than its factorization.

20003345531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21672181.

The product of its (nonzero) digits is 5400, while the sum is 26.

Adding to 20003345531 its reverse (13554330002), we get a palindrome (33557675533).

The spelling of 20003345531 in words is "twenty billion, three million, three hundred forty-five thousand, five hundred thirty-one".