21443412153 has 8 divisors (see below), whose sum is σ = 28606216608. Its totient is φ = 14288107904.

The previous prime is 21443412143. The next prime is 21443412161. The reversal of 21443412153 is 35121434412.

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

It is a cyclic number.

It is not a de Polignac number, because 21443412153 - 2⁹ = 21443411641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21443412153.

It is not an unprimeable number, because it can be changed into a prime (21443412143) 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, 1868376 + ... + 1879817.

It is an arithmetic number, because the mean of its divisors is an integer number (3575777076).

Almost surely, 2^21443412153 is an apocalyptic number.

It is an amenable number.

21443412153 is a deficient number, since it is larger than the sum of its proper divisors (7162804455).

21443412153 is a wasteful number, since it uses less digits than its factorization.

21443412153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750103.

The product of its digits is 11520, while the sum is 30.

Adding to 21443412153 its reverse (35121434412), we get a palindrome (56564846565).

The spelling of 21443412153 in words is "twenty-one billion, four hundred forty-three million, four hundred twelve thousand, one hundred fifty-three".