20763620677 has 8 divisors (see below), whose sum is σ = 20909209976. Its totient is φ = 20618200512.

The previous prime is 20763620659. The next prime is 20763620681. The reversal of 20763620677 is 77602636702.

It can be written as a sum of positive squares in 4 ways, for example, as 1208674756 + 19554945921 = 34766^2 + 139839^2 .

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 20763620677 - 2¹⁵ = 20763587909 is a prime.

It is a super-2 number, since 2×20763620677² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20763620617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209323 + ... + 292135.

It is an arithmetic number, because the mean of its divisors is an integer number (2613651247).

Almost surely, 2^20763620677 is an apocalyptic number.

It is an amenable number.

20763620677 is a deficient number, since it is larger than the sum of its proper divisors (145589299).

20763620677 is a wasteful number, since it uses less digits than its factorization.

20763620677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84567.

The product of its (nonzero) digits is 889056, while the sum is 46.

The spelling of 20763620677 in words is "twenty billion, seven hundred sixty-three million, six hundred twenty thousand, six hundred seventy-seven".