21544554005414 has 24 divisors (see below), whose sum is σ = 35525258478864. Its totient is φ = 9792027278000.

The previous prime is 21544554005371. The next prime is 21544554005419. The reversal of 21544554005414 is 41450045544512.

It is a super-2 number, since 2×21544554005414² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21544554005419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1828442 + ... + 6814125.

It is an arithmetic number, because the mean of its divisors is an integer number (1480219103286).

Almost surely, 2^{21544554005414} is an apocalyptic number.

21544554005414 is a deficient number, since it is larger than the sum of its proper divisors (13980704473450).

21544554005414 is a wasteful number, since it uses less digits than its factorization.

21544554005414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8652892 (or 8652881 counting only the distinct ones).

The product of its (nonzero) digits is 1280000, while the sum is 44.

Adding to 21544554005414 its reverse (41450045544512), we get a palindrome (62994599549926).

The spelling of 21544554005414 in words is "twenty-one trillion, five hundred forty-four billion, five hundred fifty-four million, five thousand, four hundred fourteen".