20877585549 has 8 divisors (see below), whose sum is σ = 27840142752. Its totient is φ = 13916709360.

The previous prime is 20877585541. The next prime is 20877585559. The reversal of 20877585549 is 94558577802.

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

It is not a de Polignac number, because 20877585549 - 2³ = 20877585541 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20877585492 and 20877585501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20877585541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390982 + ... + 441159.

It is an arithmetic number, because the mean of its divisors is an integer number (3480017844).

Almost surely, 2^20877585549 is an apocalyptic number.

It is an amenable number.

20877585549 is a deficient number, since it is larger than the sum of its proper divisors (6962557203).

20877585549 is an equidigital number, since it uses as much as digits as its factorization.

20877585549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840507.

The product of its (nonzero) digits is 28224000, while the sum is 60.

The spelling of 20877585549 in words is "twenty billion, eight hundred seventy-seven million, five hundred eighty-five thousand, five hundred forty-nine".