33421043243 has 24 divisors (see below), whose sum is σ = 41305186800. Its totient is φ = 26911217088.

The previous prime is 33421043203. The next prime is 33421043273. The reversal of 33421043243 is 34234012433.

It is not a de Polignac number, because 33421043243 - 2¹⁸ = 33420781099 is a prime.

It is a super-2 number, since 2×33421043243² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (33421043203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265253 + ... + 370406.

It is an arithmetic number, because the mean of its divisors is an integer number (1721049450).

Almost surely, 2^33421043243 is an apocalyptic number.

33421043243 is a deficient number, since it is larger than the sum of its proper divisors (7884143557).

33421043243 is a wasteful number, since it uses less digits than its factorization.

33421043243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635739 (or 635732 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 33421043243 its reverse (34234012433), we get a palindrome (67655055676).

The spelling of 33421043243 in words is "thirty-three billion, four hundred twenty-one million, forty-three thousand, two hundred forty-three".