21454444351532 has 12 divisors (see below), whose sum is σ = 37702370828640. Its totient is φ = 10682338400496.

The previous prime is 21454444351511. The next prime is 21454444351573. The reversal of 21454444351532 is 23515344445412.

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, 11220942743 + ... + 11220944654.

It is an arithmetic number, because the mean of its divisors is an integer number (3141864235720).

Almost surely, 2^{21454444351532} is an apocalyptic number.

It is an amenable number.

21454444351532 is a deficient number, since it is larger than the sum of its proper divisors (16247926477108).

21454444351532 is a wasteful number, since it uses less digits than its factorization.

21454444351532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22441887640 (or 22441887638 counting only the distinct ones).

The product of its digits is 4608000, while the sum is 47.

Adding to 21454444351532 its reverse (23515344445412), we get a palindrome (44969788796944).

The spelling of 21454444351532 in words is "twenty-one trillion, four hundred fifty-four billion, four hundred forty-four million, three hundred fifty-one thousand, five hundred thirty-two".