20577144799 has 8 divisors (see below), whose sum is σ = 21661920000. Its totient is φ = 19492546392.

The previous prime is 20577144779. The next prime is 20577144817. The reversal of 20577144799 is 99744177502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20577144799 - 2²³ = 20568756191 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 (20577144719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242442 + ... + 316120.

It is an arithmetic number, because the mean of its divisors is an integer number (2707740000).

Almost surely, 2^20577144799 is an apocalyptic number.

20577144799 is a deficient number, since it is larger than the sum of its proper divisors (1084775201).

20577144799 is a wasteful number, since it uses less digits than its factorization.

20577144799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88397.

The product of its (nonzero) digits is 4445280, while the sum is 55.

The spelling of 20577144799 in words is "twenty billion, five hundred seventy-seven million, one hundred forty-four thousand, seven hundred ninety-nine".