20577520572249 has 32 divisors (see below), whose sum is σ = 27667705443840. Its totient is φ = 13603482144000.

The previous prime is 20577520572239. The next prime is 20577520572253. The reversal of 20577520572249 is 94227502577502.

It is not a de Polignac number, because 20577520572249 - 2⁴³ = 11781427550041 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20577520572239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139899154 + ... + 140046164.

It is an arithmetic number, because the mean of its divisors is an integer number (864615795120).

Almost surely, 2^{20577520572249} is an apocalyptic number.

It is an amenable number.

20577520572249 is a deficient number, since it is larger than the sum of its proper divisors (7090184871591).

20577520572249 is a wasteful number, since it uses less digits than its factorization.

20577520572249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148101.

The product of its (nonzero) digits is 24696000, while the sum is 57.

The spelling of 20577520572249 in words is "twenty trillion, five hundred seventy-seven billion, five hundred twenty million, five hundred seventy-two thousand, two hundred forty-nine".