20238344145 has 24 divisors (see below), whose sum is σ = 35427129192. Its totient is φ = 10686912000.

The previous prime is 20238344129. The next prime is 20238344239. The reversal of 20238344145 is 54144383202.

20238344145 is a `hidden beast` number, since 2 + 0 + 238 + 3 + 4 + 414 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7633342161 + 12605001984 = 87369^2 + 112272^2 .

It is not a de Polignac number, because 20238344145 - 2⁴ = 20238344129 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2221896 + ... + 2230985.

It is an arithmetic number, because the mean of its divisors is an integer number (1476130383).

Almost surely, 2^20238344145 is an apocalyptic number.

It is an amenable number.

20238344145 is a deficient number, since it is larger than the sum of its proper divisors (15188785047).

20238344145 is a wasteful number, since it uses less digits than its factorization.

20238344145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4452993 (or 4452990 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The spelling of 20238344145 in words is "twenty billion, two hundred thirty-eight million, three hundred forty-four thousand, one hundred forty-five".