20556093375 has 24 divisors (see below), whose sum is σ = 37055786352. Its totient is φ = 10963249200.

The previous prime is 20556093361. The next prime is 20556093391. The reversal of 20556093375 is 57339065502.

It is a happy number.

20556093375 is a `hidden beast` number, since 2 + 0 + 5 + 5 + 609 + 3 + 37 + 5 = 666.

It is not a de Polignac number, because 20556093375 - 2¹¹ = 20556091327 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 20556093375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9134917 + ... + 9137166.

It is an arithmetic number, because the mean of its divisors is an integer number (1543991098).

Almost surely, 2^20556093375 is an apocalyptic number.

20556093375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20556093375 is a deficient number, since it is larger than the sum of its proper divisors (16499692977).

20556093375 is a wasteful number, since it uses less digits than its factorization.

20556093375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18272104 (or 18272091 counting only the distinct ones).

The product of its (nonzero) digits is 850500, while the sum is 45.

The spelling of 20556093375 in words is "twenty billion, five hundred fifty-six million, ninety-three thousand, three hundred seventy-five".