20558590532047 has 4 divisors (see below), whose sum is σ = 21060019569456. Its totient is φ = 20057161494640.

The previous prime is 20558590532023. The next prime is 20558590532107. The reversal of 20558590532047 is 74023509585502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20558590532047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20558590532147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250714518643 + ... + 250714518724.

It is an arithmetic number, because the mean of its divisors is an integer number (5265004892364).

Almost surely, 2^{20558590532047} is an apocalyptic number.

20558590532047 is a deficient number, since it is larger than the sum of its proper divisors (501429037409).

20558590532047 is an equidigital number, since it uses as much as digits as its factorization.

20558590532047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501429037408.

The product of its (nonzero) digits is 15120000, while the sum is 55.

The spelling of 20558590532047 in words is "twenty trillion, five hundred fifty-eight billion, five hundred ninety million, five hundred thirty-two thousand, forty-seven".