20552389207585 has 16 divisors (see below), whose sum is σ = 25147255541760. Its totient is φ = 16119456109120.

The previous prime is 20552389207547. The next prime is 20552389207619. The reversal of 20552389207585 is 58570298325502.

It is a happy number.

It is not a de Polignac number, because 20552389207585 - 2²⁵ = 20552355653153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29050081 + ... + 29749150.

It is an arithmetic number, because the mean of its divisors is an integer number (1571703471360).

Almost surely, 2^{20552389207585} is an apocalyptic number.

It is an amenable number.

20552389207585 is a deficient number, since it is larger than the sum of its proper divisors (4594866334175).

20552389207585 is a wasteful number, since it uses less digits than its factorization.

20552389207585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58800608.

The product of its (nonzero) digits is 60480000, while the sum is 61.

The spelling of 20552389207585 in words is "twenty trillion, five hundred fifty-two billion, three hundred eighty-nine million, two hundred seven thousand, five hundred eighty-five".