20330031432 has 16 divisors (see below), whose sum is σ = 50825078640. Its totient is φ = 6776677136.

The previous prime is 20330031367. The next prime is 20330031473. The reversal of 20330031432 is 23413003302.

It is a super-2 number, since 2×20330031432² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20330031399 and 20330031408.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 423542298 + ... + 423542345.

It is an arithmetic number, because the mean of its divisors is an integer number (3176567415).

Almost surely, 2^20330031432 is an apocalyptic number.

It is an amenable number.

20330031432 is an abundant number, since it is smaller than the sum of its proper divisors (30495047208).

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

20330031432 is a wasteful number, since it uses less digits than its factorization.

20330031432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847084652 (or 847084648 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 20330031432 its reverse (23413003302), we get a palindrome (43743034734).

The spelling of 20330031432 in words is "twenty billion, three hundred thirty million, thirty-one thousand, four hundred thirty-two".