20005440229 has 8 divisors (see below), whose sum is σ = 20161443960. Its totient is φ = 19850033856.

The previous prime is 20005440197. The next prime is 20005440239. The reversal of 20005440229 is 92204450002.

It can be written as a sum of positive squares in 4 ways, for example, as 17175413025 + 2830027204 = 131055^2 + 53198^2 .

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 20005440229 - 2⁵ = 20005440197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20005440197 and 20005440206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005440239) by changing a digit.

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, 81982 + ... + 216175.

It is an arithmetic number, because the mean of its divisors is an integer number (2520180495).

Almost surely, 2^20005440229 is an apocalyptic number.

It is an amenable number.

20005440229 is a deficient number, since it is larger than the sum of its proper divisors (156003731).

20005440229 is a wasteful number, since it uses less digits than its factorization.

20005440229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298679.

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 20005440229 in words is "twenty billion, five million, four hundred forty thousand, two hundred twenty-nine".