20238375897 has 18 divisors (see below), whose sum is σ = 29795223822. Its totient is φ = 13237663296.

The previous prime is 20238375881. The next prime is 20238375919. The reversal of 20238375897 is 79857383202.

20238375897 is a `hidden beast` number, since 2 + 0 + 23 + 8 + 37 + 589 + 7 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2297380761 + 17940995136 = 47931^2 + 133944^2 .

It is not a de Polignac number, because 20238375897 - 2⁴ = 20238375881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20238375697) 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 17 ways as a sum of consecutive naturals, for example, 374988 + ... + 425549.

Almost surely, 2^20238375897 is an apocalyptic number.

It is an amenable number.

20238375897 is a deficient number, since it is larger than the sum of its proper divisors (9556847925).

20238375897 is an equidigital number, since it uses as much as digits as its factorization.

20238375897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800649 (or 800593 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 20238375897 in words is "twenty billion, two hundred thirty-eight million, three hundred seventy-five thousand, eight hundred ninety-seven".