21042052310 has 32 divisors (see below), whose sum is σ = 38265694272. Its totient is φ = 8330250240.

The previous prime is 21042052237. The next prime is 21042052313. The reversal of 21042052310 is 1325024012.

It is a super-2 number, since 2×21042052310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21042052313) 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, 2138522 + ... + 2148338.

It is an arithmetic number, because the mean of its divisors is an integer number (1195802946).

Almost surely, 2^21042052310 is an apocalyptic number.

21042052310 is a deficient number, since it is larger than the sum of its proper divisors (17223641962).

21042052310 is a wasteful number, since it uses less digits than its factorization.

21042052310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12008.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 21042052310 its reverse (1325024012), we get a palindrome (22367076322).

The spelling of 21042052310 in words is "twenty-one billion, forty-two million, fifty-two thousand, three hundred ten".