20581534058345 has 32 divisors (see below), whose sum is σ = 27458990168064. Its totient is φ = 14706609868800.

The previous prime is 20581534058279. The next prime is 20581534058353. The reversal of 20581534058345 is 54385043518502.

It is not a de Polignac number, because 20581534058345 - 2³² = 20577239091049 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 16132169 + ... + 17361161.

It is an arithmetic number, because the mean of its divisors is an integer number (858093442752).

Almost surely, 2^{20581534058345} is an apocalyptic number.

It is an amenable number.

20581534058345 is a deficient number, since it is larger than the sum of its proper divisors (6877456109719).

20581534058345 is a wasteful number, since it uses less digits than its factorization.

20581534058345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237353.

The product of its (nonzero) digits is 11520000, while the sum is 53.

The spelling of 20581534058345 in words is "twenty trillion, five hundred eighty-one billion, five hundred thirty-four million, fifty-eight thousand, three hundred forty-five".