21454452233549 has 8 divisors (see below), whose sum is σ = 21536663781120. Its totient is φ = 21372263067600.

The previous prime is 21454452233479. The next prime is 21454452233551. The reversal of 21454452233549 is 94533225445412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21454452233549 is a prime.

It is a super-2 number, since 2×21454452233549² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21454452233549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21454452233569) 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, 3673322 + ... + 7510139.

It is an arithmetic number, because the mean of its divisors is an integer number (2692082972640).

Almost surely, 2^{21454452233549} is an apocalyptic number.

It is an amenable number.

21454452233549 is a deficient number, since it is larger than the sum of its proper divisors (82211547571).

21454452233549 is a wasteful number, since it uses less digits than its factorization.

21454452233549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11190811.

The product of its digits is 20736000, while the sum is 53.

The spelling of 21454452233549 in words is "twenty-one trillion, four hundred fifty-four billion, four hundred fifty-two million, two hundred thirty-three thousand, five hundred forty-nine".