20542114513 has 4 divisors (see below), whose sum is σ = 20544309940. Its totient is φ = 20539919088.

The previous prime is 20542114511. The next prime is 20542114519. The reversal of 20542114513 is 31541124502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9602628049 + 10939486464 = 97993^2 + 104592^2 .

It is a cyclic number.

It is not a de Polignac number, because 20542114513 - 2¹ = 20542114511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20542114511) 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, 1083618 + ... + 1102411.

It is an arithmetic number, because the mean of its divisors is an integer number (5136077485).

Almost surely, 2^20542114513 is an apocalyptic number.

It is an amenable number.

20542114513 is a deficient number, since it is larger than the sum of its proper divisors (2195427).

20542114513 is an equidigital number, since it uses as much as digits as its factorization.

20542114513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195426.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 20542114513 in words is "twenty billion, five hundred forty-two million, one hundred fourteen thousand, five hundred thirteen".