20554520542011 has 8 divisors (see below), whose sum is σ = 30451141543760. Its totient is φ = 13703013694656.

The previous prime is 20554520541949. The next prime is 20554520542051. The reversal of 20554520542011 is 11024502545502.

20554520542011 is a `hidden beast` number, since 2 + 0 + 5 + 54 + 52 + 0 + 542 + 0 + 11 = 666.

It is not a de Polignac number, because 20554520542011 - 2⁷ = 20554520541883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20554520542051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380639269270 + ... + 380639269323.

It is an arithmetic number, because the mean of its divisors is an integer number (3806392692970).

Almost surely, 2^{20554520542011} is an apocalyptic number.

20554520542011 is a deficient number, since it is larger than the sum of its proper divisors (9896621001749).

20554520542011 is an equidigital number, since it uses as much as digits as its factorization.

20554520542011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761278538602 (or 761278538596 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The spelling of 20554520542011 in words is "twenty trillion, five hundred fifty-four billion, five hundred twenty million, five hundred forty-two thousand, eleven".