20852475867 has 32 divisors (see below), whose sum is σ = 31396377600. Its totient is φ = 13676344416.

The previous prime is 20852475863. The next prime is 20852475899. The reversal of 20852475867 is 76857425802.

20852475867 is a `hidden beast` number, since 2 + 0 + 8 + 52 + 4 + 7 + 586 + 7 = 666.

It is not a de Polignac number, because 20852475867 - 2² = 20852475863 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20852475863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 516133 + ... + 555065.

It is an arithmetic number, because the mean of its divisors is an integer number (981136800).

Almost surely, 2^20852475867 is an apocalyptic number.

20852475867 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20852475867 is a deficient number, since it is larger than the sum of its proper divisors (10543901733).

20852475867 is a wasteful number, since it uses less digits than its factorization.

20852475867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39264 (or 39258 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 54.

The spelling of 20852475867 in words is "twenty billion, eight hundred fifty-two million, four hundred seventy-five thousand, eight hundred sixty-seven".