20650777077 has 16 divisors (see below), whose sum is σ = 31474000512. Its totient is φ = 11798137920.

The previous prime is 20650777027. The next prime is 20650777087. The reversal of 20650777077 is 77077705602.

It is a happy number.

It is not a de Polignac number, because 20650777077 - 2¹⁰ = 20650776053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20650777027) 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, 17023 + ... + 203939.

It is an arithmetic number, because the mean of its divisors is an integer number (1967125032).

Almost surely, 2^20650777077 is an apocalyptic number.

It is an amenable number.

20650777077 is a deficient number, since it is larger than the sum of its proper divisors (10823223435).

20650777077 is a wasteful number, since it uses less digits than its factorization.

20650777077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192188.

The product of its (nonzero) digits is 1008420, while the sum is 48.

The spelling of 20650777077 in words is "twenty billion, six hundred fifty million, seven hundred seventy-seven thousand, seventy-seven".