20168193375 has 128 divisors (see below), whose sum is σ = 40934799360. Its totient is φ = 9716976000.

The previous prime is 20168193371. The next prime is 20168193391. The reversal of 20168193375 is 57339186102.

20168193375 is a `hidden beast` number, since 201 + 68 + 19 + 3 + 375 = 666.

It is not a de Polignac number, because 20168193375 - 2² = 20168193371 is a prime.

It is a super-2 number, since 2×20168193375² (a number of 21 digits) contains 22 as substring.

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 20168193375.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20168193371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6198249 + ... + 6201501.

It is an arithmetic number, because the mean of its divisors is an integer number (319803120).

Almost surely, 2^20168193375 is an apocalyptic number.

20168193375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20168193375 is an abundant number, since it is smaller than the sum of its proper divisors (20766605985).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20168193375 is a wasteful number, since it uses less digits than its factorization.

20168193375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455 (or 3439 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 20168193375 in words is "twenty billion, one hundred sixty-eight million, one hundred ninety-three thousand, three hundred seventy-five".