20578052475 has 72 divisors (see below), whose sum is σ = 39575850912. Its totient is φ = 10183756800.

The previous prime is 20578052447. The next prime is 20578052489. The reversal of 20578052475 is 57425087502.

20578052475 is a `hidden beast` number, since 2 + 0 + 57 + 8 + 0 + 524 + 75 = 666.

It is not a de Polignac number, because 20578052475 - 2⁸ = 20578052219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20578052475.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 233689 + ... + 309461.

It is an arithmetic number, because the mean of its divisors is an integer number (549664596).

Almost surely, 2^20578052475 is an apocalyptic number.

20578052475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20578052475 is a deficient number, since it is larger than the sum of its proper divisors (18997798437).

20578052475 is a wasteful number, since it uses less digits than its factorization.

20578052475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75877 (or 75869 counting only the distinct ones).

The product of its (nonzero) digits is 784000, while the sum is 45.

The spelling of 20578052475 in words is "twenty billion, five hundred seventy-eight million, fifty-two thousand, four hundred seventy-five".