21001541330 has 64 divisors (see below), whose sum is σ = 47151486720. Its totient is φ = 6543052800.

The previous prime is 21001541269. The next prime is 21001541333. The reversal of 21001541330 is 3314510012.

It is not an unprimeable number, because it can be changed into a prime (21001541333) by changing a digit.

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, 2337086 + ... + 2346054.

It is an arithmetic number, because the mean of its divisors is an integer number (736741980).

Almost surely, 2^21001541330 is an apocalyptic number.

21001541330 is an abundant number, since it is smaller than the sum of its proper divisors (26149945390).

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

21001541330 is a wasteful number, since it uses less digits than its factorization.

21001541330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12035.

The product of its (nonzero) digits is 360, while the sum is 20.

The spelling of 21001541330 in words is "twenty-one billion, one million, five hundred forty-one thousand, three hundred thirty".