21300052144 has 40 divisors (see below), whose sum is σ = 49646743040. Its totient is φ = 8648140608.

The previous prime is 21300052141. The next prime is 21300052157. The reversal of 21300052144 is 44125000312.

It is not an unprimeable number, because it can be changed into a prime (21300052141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5002584 + ... + 5006839.

It is an arithmetic number, because the mean of its divisors is an integer number (1241168576).

Almost surely, 2^21300052144 is an apocalyptic number.

It is an amenable number.

21300052144 is an abundant number, since it is smaller than the sum of its proper divisors (28346690896).

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

21300052144 is a wasteful number, since it uses less digits than its factorization.

21300052144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10009457 (or 10009451 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21300052144 its reverse (44125000312), we get a palindrome (65425052456).

The spelling of 21300052144 in words is "twenty-one billion, three hundred million, fifty-two thousand, one hundred forty-four".