32440021420 has 12 divisors (see below), whose sum is σ = 68124045024. Its totient is φ = 12976008560.

The previous prime is 32440021391. The next prime is 32440021421. The reversal of 32440021420 is 2412004423.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 32440021391 and 32440021400.

It is not an unprimeable number, because it can be changed into a prime (32440021421) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 811000516 + ... + 811000555.

It is an arithmetic number, because the mean of its divisors is an integer number (5677003752).

Almost surely, 2^32440021420 is an apocalyptic number.

It is an amenable number.

32440021420 is an abundant number, since it is smaller than the sum of its proper divisors (35684023604).

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

32440021420 is a wasteful number, since it uses less digits than its factorization.

32440021420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622001080 (or 1622001078 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 32440021420 its reverse (2412004423), we get a palindrome (34852025843).

The spelling of 32440021420 in words is "thirty-two billion, four hundred forty million, twenty-one thousand, four hundred twenty".