21042530364 has 96 divisors (see below), whose sum is σ = 50738688000. Its totient is φ = 6784035840.

The previous prime is 21042530359. The next prime is 21042530371. The reversal of 21042530364 is 46303524012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20252157 + ... + 20253195.

It is an arithmetic number, because the mean of its divisors is an integer number (528528000).

Almost surely, 2^21042530364 is an apocalyptic number.

It is an amenable number.

21042530364 is an abundant number, since it is smaller than the sum of its proper divisors (29696157636).

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

21042530364 is a wasteful number, since it uses less digits than its factorization.

21042530364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483 (or 1481 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 21042530364 in words is "twenty-one billion, forty-two million, five hundred thirty thousand, three hundred sixty-four".