20542772755 has 4 divisors (see below), whose sum is σ = 24651327312. Its totient is φ = 16434218200.

The previous prime is 20542772753. The next prime is 20542772777. The reversal of 20542772755 is 55727724502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20542772755 - 2¹ = 20542772753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20542772753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2054277271 + ... + 2054277280.

It is an arithmetic number, because the mean of its divisors is an integer number (6162831828).

Almost surely, 2^20542772755 is an apocalyptic number.

20542772755 is a deficient number, since it is larger than the sum of its proper divisors (4108554557).

20542772755 is an equidigital number, since it uses as much as digits as its factorization.

20542772755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4108554556.

The product of its (nonzero) digits is 1372000, while the sum is 46.

The spelling of 20542772755 in words is "twenty billion, five hundred forty-two million, seven hundred seventy-two thousand, seven hundred fifty-five".