21031434232 has 64 divisors (see below), whose sum is σ = 41504762880. Its totient is φ = 9971778432.

The previous prime is 21031434223. The next prime is 21031434241. The reversal of 21031434232 is 23243413012.

It is an interprime number because it is at equal distance from previous prime (21031434223) and next prime (21031434241).

It is a junction number, because it is equal to n+sod(n) for n = 21031434197 and 21031434206.

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 15 ways as a sum of consecutive naturals, for example, 14737503 + ... + 14738929.

It is an arithmetic number, because the mean of its divisors is an integer number (648511920).

Almost surely, 2^21031434232 is an apocalyptic number.

It is an amenable number.

21031434232 is a deficient number, since it is larger than the sum of its proper divisors (20473328648).

21031434232 is a wasteful number, since it uses less digits than its factorization.

21031434232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092 (or 2088 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21031434232 its reverse (23243413012), we get a palindrome (44274847244).

The spelling of 21031434232 in words is "twenty-one billion, thirty-one million, four hundred thirty-four thousand, two hundred thirty-two".