21000241352 has 32 divisors (see below), whose sum is σ = 39845520000. Its totient is φ = 10374933888.

The previous prime is 21000241331. The next prime is 21000241387. The reversal of 21000241352 is 25314200012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1100549 + ... + 1119467.

It is an arithmetic number, because the mean of its divisors is an integer number (1245172500).

Almost surely, 2^21000241352 is an apocalyptic number.

It is an amenable number.

21000241352 is a deficient number, since it is larger than the sum of its proper divisors (18845278648).

21000241352 is a wasteful number, since it uses less digits than its factorization.

21000241352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20573 (or 20569 counting only the distinct ones).

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

Adding to 21000241352 its reverse (25314200012), we get a palindrome (46314441364).

The spelling of 21000241352 in words is "twenty-one billion, two hundred forty-one thousand, three hundred fifty-two".