20364563132461 has 4 divisors (see below), whose sum is σ = 20364592732924. Its totient is φ = 20364533532000.

The previous prime is 20364563132453. The next prime is 20364563132609. The reversal of 20364563132461 is 16423136546302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7103450952900 + 13261112179561 = 2665230^2 + 3641581^2 .

It is a cyclic number.

It is not a de Polignac number, because 20364563132461 - 2³ = 20364563132453 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 (20364563102461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13743090 + ... + 15152611.

It is an arithmetic number, because the mean of its divisors is an integer number (5091148183231).

Almost surely, 2^{20364563132461} is an apocalyptic number.

It is an amenable number.

20364563132461 is a deficient number, since it is larger than the sum of its proper divisors (29600463).

20364563132461 is an equidigital number, since it uses as much as digits as its factorization.

20364563132461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29600462.

The product of its (nonzero) digits is 1866240, while the sum is 46.

Adding to 20364563132461 its reverse (16423136546302), we get a palindrome (36787699678763).

The spelling of 20364563132461 in words is "twenty trillion, three hundred sixty-four billion, five hundred sixty-three million, one hundred thirty-two thousand, four hundred sixty-one".