20009364481 has 4 divisors (see below), whose sum is σ = 20074541872. Its totient is φ = 19944187092.

The previous prime is 20009364449. The next prime is 20009364499. The reversal of 20009364481 is 18446390002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20009364481 - 2⁵ = 20009364449 is a prime.

It is a super-2 number, since 2×20009364481² (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 20009364481.

It is not an unprimeable number, because it can be changed into a prime (20009361481) 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 3 ways as a sum of consecutive naturals, for example, 32588235 + ... + 32588848.

It is an arithmetic number, because the mean of its divisors is an integer number (5018635468).

Almost surely, 2^20009364481 is an apocalyptic number.

It is an amenable number.

20009364481 is a deficient number, since it is larger than the sum of its proper divisors (65177391).

20009364481 is an equidigital number, since it uses as much as digits as its factorization.

20009364481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65177390.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 20009364481 in words is "twenty billion, nine million, three hundred sixty-four thousand, four hundred eighty-one".