20453326564121 has 16 divisors (see below), whose sum is σ = 23648372350848. Its totient is φ = 17483032070400.

The previous prime is 20453326564091. The next prime is 20453326564211. The reversal of 20453326564121 is 12146562335402.

It is a de Polignac number, because none of the positive numbers 2^k-20453326564121 is a prime.

It is a super-2 number, since 2×20453326564121² (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 (20453326594121) 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, 53372285 + ... + 53754138.

It is an arithmetic number, because the mean of its divisors is an integer number (1478023271928).

Almost surely, 2^{20453326564121} is an apocalyptic number.

It is an amenable number.

20453326564121 is a deficient number, since it is larger than the sum of its proper divisors (3195045786727).

20453326564121 is a wasteful number, since it uses less digits than its factorization.

20453326564121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107127472.

The product of its (nonzero) digits is 1036800, while the sum is 44.

Adding to 20453326564121 its reverse (12146562335402), we get a palindrome (32599888899523).

The spelling of 20453326564121 in words is "twenty trillion, four hundred fifty-three billion, three hundred twenty-six million, five hundred sixty-four thousand, one hundred twenty-one".