20540543555 has 8 divisors (see below), whose sum is σ = 28169888352. Its totient is φ = 14084944128.

The previous prime is 20540543533. The next prime is 20540543587. The reversal of 20540543555 is 55534504502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20540543555 - 2⁸ = 20540543299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293436302 + ... + 293436371.

It is an arithmetic number, because the mean of its divisors is an integer number (3521236044).

Almost surely, 2^20540543555 is an apocalyptic number.

20540543555 is a deficient number, since it is larger than the sum of its proper divisors (7629344797).

20540543555 is an equidigital number, since it uses as much as digits as its factorization.

20540543555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586872685.

The product of its (nonzero) digits is 300000, while the sum is 38.

The spelling of 20540543555 in words is "twenty billion, five hundred forty million, five hundred forty-three thousand, five hundred fifty-five".