20413503423265 has 4 divisors (see below), whose sum is σ = 24496204107924. Its totient is φ = 16330802738608.

The previous prime is 20413503423253. The next prime is 20413503423307. The reversal of 20413503423265 is 56232430531402.

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 5347360254096 + 15066143169169 = 2312436^2 + 3881513^2 .

It is a cyclic number.

It is not a de Polignac number, because 20413503423265 - 2⁵ = 20413503423233 is a prime.

It is a super-2 number, since 2×20413503423265² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2041350342322 + ... + 2041350342331.

It is an arithmetic number, because the mean of its divisors is an integer number (6124051026981).

Almost surely, 2^{20413503423265} is an apocalyptic number.

It is an amenable number.

20413503423265 is a deficient number, since it is larger than the sum of its proper divisors (4082700684659).

20413503423265 is an equidigital number, since it uses as much as digits as its factorization.

20413503423265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4082700684658.

The product of its (nonzero) digits is 518400, while the sum is 40.

Adding to 20413503423265 its reverse (56232430531402), we get a palindrome (76645933954667).

The spelling of 20413503423265 in words is "twenty trillion, four hundred thirteen billion, five hundred three million, four hundred twenty-three thousand, two hundred sixty-five".