20543055878 has 16 divisors (see below), whose sum is σ = 31214400000. Its totient is φ = 10138337352.

The previous prime is 20543055853. The next prime is 20543055947. The reversal of 20543055878 is 87855034502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534263 + ... + 571421.

It is an arithmetic number, because the mean of its divisors is an integer number (1950900000).

Almost surely, 2^20543055878 is an apocalyptic number.

20543055878 is a deficient number, since it is larger than the sum of its proper divisors (10671344122).

20543055878 is a wasteful number, since it uses less digits than its factorization.

20543055878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40739.

The product of its (nonzero) digits is 1344000, while the sum is 47.

The spelling of 20543055878 in words is "twenty billion, five hundred forty-three million, fifty-five thousand, eight hundred seventy-eight".