20215104445605 has 16 divisors (see below), whose sum is σ = 32344222847040. Its totient is φ = 10781370459648.

The previous prime is 20215104445603. The next prime is 20215104445607. The reversal of 20215104445605 is 50654440151202.

It is an interprime number because it is at equal distance from previous prime (20215104445603) and next prime (20215104445607).

It is not a de Polignac number, because 20215104445605 - 2¹ = 20215104445603 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20215104445603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16476154 + ... + 17660516.

It is an arithmetic number, because the mean of its divisors is an integer number (2021513927940).

Almost surely, 2^{20215104445605} is an apocalyptic number.

It is an amenable number.

20215104445605 is a deficient number, since it is larger than the sum of its proper divisors (12129118401435).

20215104445605 is a wasteful number, since it uses less digits than its factorization.

20215104445605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322260.

The product of its (nonzero) digits is 192000, while the sum is 39.

Adding to 20215104445605 its reverse (50654440151202), we get a palindrome (70869544596807).

The spelling of 20215104445605 in words is "twenty trillion, two hundred fifteen billion, one hundred four million, four hundred forty-five thousand, six hundred five".