20006027421145 has 8 divisors (see below), whose sum is σ = 24009767242056. Its totient is φ = 16003132379136.

The previous prime is 20006027421113. The next prime is 20006027421187. The reversal of 20006027421145 is 54112472060002.

It can be written as a sum of positive squares in 4 ways, for example, as 11206907819584 + 8799119601561 = 3347672^2 + 2966331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20006027421145 - 2⁵ = 20006027421113 is a prime.

It is a super-2 number, since 2×20006027421145² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20006027421145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211142622 + ... + 211237351.

It is an arithmetic number, because the mean of its divisors is an integer number (3001220905257).

Almost surely, 2^{20006027421145} is an apocalyptic number.

It is an amenable number.

20006027421145 is a deficient number, since it is larger than the sum of its proper divisors (4003739820911).

20006027421145 is an equidigital number, since it uses as much as digits as its factorization.

20006027421145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422389451.

The product of its (nonzero) digits is 26880, while the sum is 34.

Adding to 20006027421145 its reverse (54112472060002), we get a palindrome (74118499481147).

The spelling of 20006027421145 in words is "twenty trillion, six billion, twenty-seven million, four hundred twenty-one thousand, one hundred forty-five".