20630505389 has 8 divisors (see below), whose sum is σ = 22218739200. Its totient is φ = 19042453296.

The previous prime is 20630505353. The next prime is 20630505403. The reversal of 20630505389 is 98350503602.

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 20630505389 - 2¹² = 20630501293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630505289) 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 7 ways as a sum of consecutive naturals, for example, 273164 + ... + 340410.

It is an arithmetic number, because the mean of its divisors is an integer number (2777342400).

Almost surely, 2^20630505389 is an apocalyptic number.

It is an amenable number.

20630505389 is a deficient number, since it is larger than the sum of its proper divisors (1588233811).

20630505389 is a wasteful number, since it uses less digits than its factorization.

20630505389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90859.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 20630505389 in words is "twenty billion, six hundred thirty million, five hundred five thousand, three hundred eighty-nine".