21016443153 has 8 divisors (see below), whose sum is σ = 29496762400. Its totient is φ = 13273543008.

The previous prime is 21016443143. The next prime is 21016443167. The reversal of 21016443153 is 35134461012.

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

It is not a de Polignac number, because 21016443153 - 2⁵ = 21016443121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21016443153.

It is not an unprimeable number, because it can be changed into a prime (21016443143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184354708 + ... + 184354821.

It is an arithmetic number, because the mean of its divisors is an integer number (3687095300).

Almost surely, 2^21016443153 is an apocalyptic number.

It is an amenable number.

21016443153 is a deficient number, since it is larger than the sum of its proper divisors (8480319247).

21016443153 is a wasteful number, since it uses less digits than its factorization.

21016443153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368709551.

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 21016443153 in words is "twenty-one billion, sixteen million, four hundred forty-three thousand, one hundred fifty-three".