20555442677 has 16 divisors (see below), whose sum is σ = 26741809152. Its totient is φ = 15320825520.

The previous prime is 20555442671. The next prime is 20555442703. The reversal of 20555442677 is 77624455502.

It is not a de Polignac number, because 20555442677 - 2²⁶ = 20488333813 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 (20555442671) 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, 5801573 + ... + 5805114.

It is an arithmetic number, because the mean of its divisors is an integer number (1671363072).

Almost surely, 2^20555442677 is an apocalyptic number.

It is an amenable number.

20555442677 is a deficient number, since it is larger than the sum of its proper divisors (6186366475).

20555442677 is a wasteful number, since it uses less digits than its factorization.

20555442677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11606728.

The product of its (nonzero) digits is 2352000, while the sum is 47.

The spelling of 20555442677 in words is "twenty billion, five hundred fifty-five million, four hundred forty-two thousand, six hundred seventy-seven".