21131303032 has 32 divisors (see below), whose sum is σ = 45427000320. Its totient is φ = 9027145440.

The previous prime is 21131303029. The next prime is 21131303041. The reversal of 21131303032 is 23030313112.

It is a congruent number.

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, 589248 + ... + 624079.

It is an arithmetic number, because the mean of its divisors is an integer number (1419593760).

Almost surely, 2^21131303032 is an apocalyptic number.

It is an amenable number.

21131303032 is an abundant number, since it is smaller than the sum of its proper divisors (24295697288).

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

21131303032 is a wasteful number, since it uses less digits than its factorization.

21131303032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213651 (or 1213647 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21131303032 its reverse (23030313112), we get a palindrome (44161616144).

The spelling of 21131303032 in words is "twenty-one billion, one hundred thirty-one million, three hundred three thousand, thirty-two".