21000311032 has 32 divisors (see below), whose sum is σ = 41702313600. Its totient is φ = 9886476384.

The previous prime is 21000311029. The next prime is 21000311041. The reversal of 21000311032 is 23011300012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399028 + ... + 448579.

It is an arithmetic number, because the mean of its divisors is an integer number (1303197300).

Almost surely, 2^21000311032 is an apocalyptic number.

It is an amenable number.

21000311032 is a deficient number, since it is larger than the sum of its proper divisors (20702002568).

21000311032 is a wasteful number, since it uses less digits than its factorization.

21000311032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847795 (or 847791 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21000311032 its reverse (23011300012), we get a palindrome (44011611044).

The spelling of 21000311032 in words is "twenty-one billion, three hundred eleven thousand, thirty-two".