20038228582465 has 4 divisors (see below), whose sum is σ = 24045874298964. Its totient is φ = 16030582865968.

The previous prime is 20038228582447. The next prime is 20038228582481. The reversal of 20038228582465 is 56428582283002.

It is a happy number.

It is a Cunningham number, because it is equal to 4476408²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7213757992336 + 12824470590129 = 2685844^2 + 3581127^2 .

It is a cyclic number.

It is not a de Polignac number, because 20038228582465 - 2¹⁵ = 20038228549697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2003822858242 + ... + 2003822858251.

It is an arithmetic number, because the mean of its divisors is an integer number (6011468574741).

Almost surely, 2^{20038228582465} is an apocalyptic number.

It is an amenable number.

20038228582465 is a deficient number, since it is larger than the sum of its proper divisors (4007645716499).

20038228582465 is an equidigital number, since it uses as much as digits as its factorization.

20038228582465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007645716498.

The product of its (nonzero) digits is 14745600, while the sum is 55.

The spelling of 20038228582465 in words is "twenty trillion, thirty-eight billion, two hundred twenty-eight million, five hundred eighty-two thousand, four hundred sixty-five".