20360621205 has 12 divisors (see below), whose sum is σ = 35291743500. Its totient is φ = 10858997952.

The previous prime is 20360621191. The next prime is 20360621219. The reversal of 20360621205 is 50212606302.

20360621205 is a `hidden beast` number, since 2 + 0 + 36 + 0 + 621 + 2 + 0 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (20360621191) and next prime (20360621219).

It can be written as a sum of positive squares in 2 ways, for example, as 3964843089 + 16395778116 = 62967^2 + 128046^2 .

It is not a de Polignac number, because 20360621205 - 2¹¹ = 20360619157 is a prime.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 226229080 + ... + 226229169.

It is an arithmetic number, because the mean of its divisors is an integer number (2940978625).

Almost surely, 2^20360621205 is an apocalyptic number.

It is an amenable number.

20360621205 is a deficient number, since it is larger than the sum of its proper divisors (14931122295).

20360621205 is a wasteful number, since it uses less digits than its factorization.

20360621205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452458260 (or 452458257 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The spelling of 20360621205 in words is "twenty billion, three hundred sixty million, six hundred twenty-one thousand, two hundred five".