21344272160 has 24 divisors (see below), whose sum is σ = 50425843356. Its totient is φ = 8537708800.

The previous prime is 21344272141. The next prime is 21344272163. The reversal of 21344272160 is 6127244312.

It can be written as a sum of positive squares in 2 ways, for example, as 18890853136 + 2453419024 = 137444^2 + 49532^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (21344272163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66700691 + ... + 66701010.

Almost surely, 2^21344272160 is an apocalyptic number.

21344272160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21344272160 is an abundant number, since it is smaller than the sum of its proper divisors (29081571196).

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

21344272160 is a wasteful number, since it uses less digits than its factorization.

21344272160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133401716 (or 133401708 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The spelling of 21344272160 in words is "twenty-one billion, three hundred forty-four million, two hundred seventy-two thousand, one hundred sixty".