21344553147 has 8 divisors (see below), whose sum is σ = 28849259344. Its totient is φ = 14034774528.

The previous prime is 21344553077. The next prime is 21344553149. The reversal of 21344553147 is 74135544312.

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

It is not a de Polignac number, because 21344553147 - 2¹⁰ = 21344552123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21344553149) 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, 48731638 + ... + 48732075.

It is an arithmetic number, because the mean of its divisors is an integer number (3606157418).

Almost surely, 2^21344553147 is an apocalyptic number.

21344553147 is a deficient number, since it is larger than the sum of its proper divisors (7504706197).

21344553147 is an equidigital number, since it uses as much as digits as its factorization.

21344553147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97463789.

The product of its digits is 201600, while the sum is 39.

The spelling of 21344553147 in words is "twenty-one billion, three hundred forty-four million, five hundred fifty-three thousand, one hundred forty-seven".