20854813677 has 16 divisors (see below), whose sum is σ = 27898565760. Its totient is φ = 13857177600.

The previous prime is 20854813669. The next prime is 20854813711. The reversal of 20854813677 is 77631845802.

It is not a de Polignac number, because 20854813677 - 2³ = 20854813669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20854813627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2711277 + ... + 2718957.

It is an arithmetic number, because the mean of its divisors is an integer number (1743660360).

Almost surely, 2^20854813677 is an apocalyptic number.

It is an amenable number.

20854813677 is a deficient number, since it is larger than the sum of its proper divisors (7043752083).

20854813677 is a wasteful number, since it uses less digits than its factorization.

20854813677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10564.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 20854813677 in words is "twenty billion, eight hundred fifty-four million, eight hundred thirteen thousand, six hundred seventy-seven".