21240552304 has 10 divisors (see below), whose sum is σ = 41153570120. Its totient is φ = 10620276144.

The previous prime is 21240552287. The next prime is 21240552391. The reversal of 21240552304 is 40325504212.

It is a super-2 number, since 2×21240552304² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663767244 + ... + 663767275.

It is an arithmetic number, because the mean of its divisors is an integer number (4115357012).

Almost surely, 2^21240552304 is an apocalyptic number.

It is an amenable number.

21240552304 is a deficient number, since it is larger than the sum of its proper divisors (19913017816).

21240552304 is a wasteful number, since it uses less digits than its factorization.

21240552304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327534527 (or 1327534521 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The spelling of 21240552304 in words is "twenty-one billion, two hundred forty million, five hundred fifty-two thousand, three hundred four".