33044403421 has 4 divisors (see below), whose sum is σ = 33045882012. Its totient is φ = 33042924832.

The previous prime is 33044403397. The next prime is 33044403433. The reversal of 33044403421 is 12430444033.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12430444033 = 7 ⋅1775777719.

It can be written as a sum of positive squares in 2 ways, for example, as 134815321 + 32909588100 = 11611^2 + 181410^2 .

It is a cyclic number.

It is not a de Polignac number, because 33044403421 - 2⁵ = 33044403389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33044403421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33044400421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705250 + ... + 750643.

It is an arithmetic number, because the mean of its divisors is an integer number (8261470503).

Almost surely, 2^33044403421 is an apocalyptic number.

It is an amenable number.

33044403421 is a deficient number, since it is larger than the sum of its proper divisors (1478591).

33044403421 is a wasteful number, since it uses less digits than its factorization.

33044403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478590.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 33044403421 its reverse (12430444033), we get a palindrome (45474847454).

The spelling of 33044403421 in words is "thirty-three billion, forty-four million, four hundred three thousand, four hundred twenty-one".