21442025351345 has 8 divisors (see below), whose sum is σ = 26425847460264. Its totient is φ = 16690008921984.

The previous prime is 21442025351303. The next prime is 21442025351347. The reversal of 21442025351345 is 54315352024412.

It can be written as a sum of positive squares in 4 ways, for example, as 6981680590369 + 14460344760976 = 2642287^2 + 3802676^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21442025351345 - 2²⁸ = 21441756915889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21442025351347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57951419684 + ... + 57951420053.

It is an arithmetic number, because the mean of its divisors is an integer number (3303230932533).

Almost surely, 2^{21442025351345} is an apocalyptic number.

It is an amenable number.

21442025351345 is a deficient number, since it is larger than the sum of its proper divisors (4983822108919).

21442025351345 is a wasteful number, since it uses less digits than its factorization.

21442025351345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115902839779.

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 21442025351345 its reverse (54315352024412), we get a palindrome (75757377375757).

The spelling of 21442025351345 in words is "twenty-one trillion, four hundred forty-two billion, twenty-five million, three hundred fifty-one thousand, three hundred forty-five".