20540754077 has 2 divisors, whose sum is σ = 20540754078. Its totient is φ = 20540754076.

The previous prime is 20540754071. The next prime is 20540754097. The reversal of 20540754077 is 77045704502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18763794361 + 1776959716 = 136981^2 + 42154^2 .

It is a cyclic number.

It is not a de Polignac number, because 20540754077 - 2²⁸ = 20272318621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20540754071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270377038 + 10270377039.

It is an arithmetic number, because the mean of its divisors is an integer number (10270377039).

Almost surely, 2^20540754077 is an apocalyptic number.

It is an amenable number.

20540754077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20540754077 is an equidigital number, since it uses as much as digits as its factorization.

20540754077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 274400, while the sum is 41.

The spelling of 20540754077 in words is "twenty billion, five hundred forty million, seven hundred fifty-four thousand, seventy-seven".