20455706667261 has 16 divisors (see below), whose sum is σ = 28117925472384. Its totient is φ = 13218115644864.

The previous prime is 20455706667247. The next prime is 20455706667287. The reversal of 20455706667261 is 16276660755402.

It is not a de Polignac number, because 20455706667261 - 2¹⁰ = 20455706666237 is a prime.

It is a super-2 number, since 2×20455706667261² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455706667211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350323746 + ... + 350382131.

It is an arithmetic number, because the mean of its divisors is an integer number (1757370342024).

Almost surely, 2^{20455706667261} is an apocalyptic number.

It is an amenable number.

20455706667261 is a deficient number, since it is larger than the sum of its proper divisors (7662218805123).

20455706667261 is a wasteful number, since it uses less digits than its factorization.

20455706667261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700706180.

The product of its (nonzero) digits is 25401600, while the sum is 57.

The spelling of 20455706667261 in words is "twenty trillion, four hundred fifty-five billion, seven hundred six million, six hundred sixty-seven thousand, two hundred sixty-one".