21243629270508 has 48 divisors (see below), whose sum is σ = 49607734848000. Its totient is φ = 7075601273664.

The previous prime is 21243629270503. The next prime is 21243629270531. The reversal of 21243629270508 is 80507292634212.

21243629270508 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (21243629270503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183002541 + ... + 183118587.

It is an arithmetic number, because the mean of its divisors is an integer number (1033494476000).

It is a 1-persistent number, because it is pandigital, but 2⋅21243629270508 = 42487258541016 is not.

Almost surely, 2^{21243629270508} is an apocalyptic number.

It is an amenable number.

21243629270508 is an abundant number, since it is smaller than the sum of its proper divisors (28364105577492).

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

21243629270508 is a wasteful number, since it uses less digits than its factorization.

21243629270508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128006 (or 128004 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 21243629270508 in words is "twenty-one trillion, two hundred forty-three billion, six hundred twenty-nine million, two hundred seventy thousand, five hundred eight".