21025104044353 has 16 divisors (see below), whose sum is σ = 22510490961600. Its totient is φ = 19577708052480.

The previous prime is 21025104044339. The next prime is 21025104044447. The reversal of 21025104044353 is 35344040152012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21025104044353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21025104044753) 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, 5318593 + ... + 8386753.

It is an arithmetic number, because the mean of its divisors is an integer number (1406905685100).

Almost surely, 2^{21025104044353} is an apocalyptic number.

It is an amenable number.

21025104044353 is a deficient number, since it is larger than the sum of its proper divisors (1485386917247).

21025104044353 is a wasteful number, since it uses less digits than its factorization.

21025104044353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074352.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 21025104044353 its reverse (35344040152012), we get a palindrome (56369144196365).

The spelling of 21025104044353 in words is "twenty-one trillion, twenty-five billion, one hundred four million, forty-four thousand, three hundred fifty-three".