21453642633445 has 16 divisors (see below), whose sum is σ = 28614669835392. Its totient is φ = 15308259578560.

The previous prime is 21453642633433. The next prime is 21453642633457. The reversal of 21453642633445 is 54433624635412.

It is an interprime number because it is at equal distance from previous prime (21453642633433) and next prime (21453642633457).

It is not a de Polignac number, because 21453642633445 - 2⁵ = 21453642633413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21453642633392 and 21453642633401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3679867177 + ... + 3679873006.

It is an arithmetic number, because the mean of its divisors is an integer number (1788416864712).

Almost surely, 2^{21453642633445} is an apocalyptic number.

It is an amenable number.

21453642633445 is a deficient number, since it is larger than the sum of its proper divisors (7161027201947).

21453642633445 is a wasteful number, since it uses less digits than its factorization.

21453642633445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7359740252.

The product of its digits is 24883200, while the sum is 52.

The spelling of 21453642633445 in words is "twenty-one trillion, four hundred fifty-three billion, six hundred forty-two million, six hundred thirty-three thousand, four hundred forty-five".