20365111652401 has 4 divisors (see below), whose sum is σ = 20710283036400. Its totient is φ = 20019940268404.

The previous prime is 20365111652359. The next prime is 20365111652441. The reversal of 20365111652401 is 10425611156302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20365111652401 - 2⁹ = 20365111651889 is a prime.

It is a super-2 number, since 2×20365111652401² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20365111652441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172585691911 + ... + 172585692028.

It is an arithmetic number, because the mean of its divisors is an integer number (5177570759100).

Almost surely, 2^{20365111652401} is an apocalyptic number.

It is an amenable number.

20365111652401 is a deficient number, since it is larger than the sum of its proper divisors (345171383999).

20365111652401 is an equidigital number, since it uses as much as digits as its factorization.

20365111652401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345171383998.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 20365111652401 in words is "twenty trillion, three hundred sixty-five billion, one hundred eleven million, six hundred fifty-two thousand, four hundred one".