20320223625465 has 16 divisors (see below), whose sum is σ = 32512705907328. Its totient is φ = 10837336564736.

The previous prime is 20320223625431. The next prime is 20320223625469. The reversal of 20320223625465 is 56452632202302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20320223625465 - 2¹³ = 20320223617273 is a prime.

It is a super-2 number, since 2×20320223625465² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20320223625469) 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 15 ways as a sum of consecutive naturals, for example, 5795112 + ... + 8615321.

It is an arithmetic number, because the mean of its divisors is an integer number (2032044119208).

Almost surely, 2^{20320223625465} is an apocalyptic number.

It is an amenable number.

20320223625465 is a deficient number, since it is larger than the sum of its proper divisors (12192482281863).

20320223625465 is a wasteful number, since it uses less digits than its factorization.

20320223625465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14504448.

The product of its (nonzero) digits is 1036800, while the sum is 42.

Adding to 20320223625465 its reverse (56452632202302), we get a palindrome (76772855827767).

The spelling of 20320223625465 in words is "twenty trillion, three hundred twenty billion, two hundred twenty-three million, six hundred twenty-five thousand, four hundred sixty-five".