21453866835412 has 12 divisors (see below), whose sum is σ = 40957382140416. Its totient is φ = 9751757652440.

The previous prime is 21453866835361. The next prime is 21453866835421.

It is a happy number.

21453866835412 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243793941268 + ... + 243793941355.

It is an arithmetic number, because the mean of its divisors is an integer number (3413115178368).

Almost surely, 2^{21453866835412} is an apocalyptic number.

21453866835412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21453866835412 is a deficient number, since it is larger than the sum of its proper divisors (19503515305004).

21453866835412 is a wasteful number, since it uses less digits than its factorization.

21453866835412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487587882638 (or 487587882636 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 58.

The spelling of 21453866835412 in words is "twenty-one trillion, four hundred fifty-three billion, eight hundred sixty-six million, eight hundred thirty-five thousand, four hundred twelve".