33442442421 has 32 divisors (see below), whose sum is σ = 45888610560. Its totient is φ = 21655987200.

The previous prime is 33442442413. The next prime is 33442442447. The reversal of 33442442421 is 12424424433.

It is not a de Polignac number, because 33442442421 - 2³ = 33442442413 is a prime.

It is a super-2 number, since 2×33442442421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33442441421) 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 31 ways as a sum of consecutive naturals, for example, 7329981 + ... + 7334541.

It is an arithmetic number, because the mean of its divisors is an integer number (1434019080).

Almost surely, 2^33442442421 is an apocalyptic number.

It is an amenable number.

33442442421 is a deficient number, since it is larger than the sum of its proper divisors (12446168139).

33442442421 is a wasteful number, since it uses less digits than its factorization.

33442442421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117.

The product of its digits is 73728, while the sum is 33.

Adding to 33442442421 its reverse (12424424433), we get a palindrome (45866866854).

The spelling of 33442442421 in words is "thirty-three billion, four hundred forty-two million, four hundred forty-two thousand, four hundred twenty-one".