21431132030 has 128 divisors (see below), whose sum is σ = 49370259456. Its totient is φ = 6505027200.

The previous prime is 21431132011. The next prime is 21431132089. The reversal of 21431132030 is 3023113412.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21431131993 and 21431132011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4535249 + ... + 4539971.

It is an arithmetic number, because the mean of its divisors is an integer number (385705152).

Almost surely, 2^21431132030 is an apocalyptic number.

21431132030 is an abundant number, since it is smaller than the sum of its proper divisors (27939127426).

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

21431132030 is a wasteful number, since it uses less digits than its factorization.

21431132030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4902.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21431132030 its reverse (3023113412), we get a palindrome (24454245442).

The spelling of 21431132030 in words is "twenty-one billion, four hundred thirty-one million, one hundred thirty-two thousand, thirty".