20305400105 has 8 divisors (see below), whose sum is σ = 24367779072. Its totient is φ = 16243454128.

The previous prime is 20305400053. The next prime is 20305400113. The reversal of 20305400105 is 50100450302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20305400105 is a prime.

It is a super-2 number, since 2×20305400105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

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, 5864 + ... + 201606.

It is an arithmetic number, because the mean of its divisors is an integer number (3045972384).

Almost surely, 2^20305400105 is an apocalyptic number.

It is an amenable number.

20305400105 is a deficient number, since it is larger than the sum of its proper divisors (4062378967).

20305400105 is a wasteful number, since it uses less digits than its factorization.

20305400105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216495.

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 20305400105 its reverse (50100450302), we get a palindrome (70405850407).

The spelling of 20305400105 in words is "twenty billion, three hundred five million, four hundred thousand, one hundred five".