20672613277 has 4 divisors (see below), whose sum is σ = 20672906940. Its totient is φ = 20672319616.

The previous prime is 20672613253. The next prime is 20672613293. The reversal of 20672613277 is 77231627602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 77231627602 = 2 ⋅38615813801.

It can be written as a sum of positive squares in 2 ways, for example, as 10369145241 + 10303468036 = 101829^2 + 101506^2 .

It is a cyclic number.

It is not a de Polignac number, because 20672613277 - 2¹¹ = 20672611229 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 (20672613077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28749 + ... + 205357.

It is an arithmetic number, because the mean of its divisors is an integer number (5168226735).

Almost surely, 2^20672613277 is an apocalyptic number.

It is an amenable number.

20672613277 is a deficient number, since it is larger than the sum of its proper divisors (293663).

20672613277 is a wasteful number, since it uses less digits than its factorization.

20672613277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293662.

The product of its (nonzero) digits is 296352, while the sum is 43.

The spelling of 20672613277 in words is "twenty billion, six hundred seventy-two million, six hundred thirteen thousand, two hundred seventy-seven".