21344055075 has 72 divisors (see below), whose sum is σ = 43821678368. Its totient is φ = 9728087040.

The previous prime is 21344055053. The next prime is 21344055107. The reversal of 21344055075 is 57055044312.

21344055075 is a `hidden beast` number, since 2 + 1 + 34 + 4 + 0 + 550 + 75 = 666.

It is not a de Polignac number, because 21344055075 - 2⁵ = 21344055043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 510669 + ... + 550881.

Almost surely, 2^21344055075 is an apocalyptic number.

21344055075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21344055075 is an abundant number, since it is smaller than the sum of its proper divisors (22477623293).

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

21344055075 is a wasteful number, since it uses less digits than its factorization.

21344055075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40573 (or 40565 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

Adding to 21344055075 its reverse (57055044312), we get a palindrome (78399099387).

The spelling of 21344055075 in words is "twenty-one billion, three hundred forty-four million, fifty-five thousand, seventy-five".