20145852974975 has 24 divisors (see below), whose sum is σ = 30745671005280. Its totient is φ = 12751660782720.

The previous prime is 20145852974899. The next prime is 20145852974981. The reversal of 20145852974975 is 57947925854102.

It is a happy number.

It is not a de Polignac number, because 20145852974975 - 2²² = 20145848780671 is a prime.

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, 4427657720 + ... + 4427662269.

It is an arithmetic number, because the mean of its divisors is an integer number (1281069625220).

Almost surely, 2^{20145852974975} is an apocalyptic number.

20145852974975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20145852974975 is a deficient number, since it is larger than the sum of its proper divisors (10599818030305).

20145852974975 is a wasteful number, since it uses less digits than its factorization.

20145852974975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8855320019 (or 8855320014 counting only the distinct ones).

The product of its (nonzero) digits is 254016000, while the sum is 68.

The spelling of 20145852974975 in words is "twenty trillion, one hundred forty-five billion, eight hundred fifty-two million, nine hundred seventy-four thousand, nine hundred seventy-five".