21344747148 has 36 divisors (see below), whose sum is σ = 54342954120. Its totient is φ = 7063727616.

The previous prime is 21344747141. The next prime is 21344747159. The reversal of 21344747148 is 84174744312.

21344747148 is a `hidden beast` number, since 2 + 1 + 34 + 474 + 7 + 148 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (21344747141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2127765 + ... + 2137772.

Almost surely, 2^21344747148 is an apocalyptic number.

It is an amenable number.

21344747148 is an abundant number, since it is smaller than the sum of its proper divisors (32998206972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21344747148 is a wasteful number, since it uses less digits than its factorization.

21344747148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4265686 (or 4265681 counting only the distinct ones).

The product of its digits is 602112, while the sum is 45.

The spelling of 21344747148 in words is "twenty-one billion, three hundred forty-four million, seven hundred forty-seven thousand, one hundred forty-eight".