33040023421 has 4 divisors (see below), whose sum is σ = 33075589500. Its totient is φ = 33004457344.

The previous prime is 33040023361. The next prime is 33040023427. The reversal of 33040023421 is 12432004033.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4314519225 + 28725504196 = 65685^2 + 169486^2 .

It is a cyclic number.

It is not a de Polignac number, because 33040023421 - 2⁹ = 33040022909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33040023392 and 33040023401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33040023427) 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, 17781646 + ... + 17783503.

It is an arithmetic number, because the mean of its divisors is an integer number (8268897375).

Almost surely, 2^33040023421 is an apocalyptic number.

It is an amenable number.

33040023421 is a deficient number, since it is larger than the sum of its proper divisors (35566079).

33040023421 is an equidigital number, since it uses as much as digits as its factorization.

33040023421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35566078.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 33040023421 its reverse (12432004033), we get a palindrome (45472027454).

The spelling of 33040023421 in words is "thirty-three billion, forty million, twenty-three thousand, four hundred twenty-one".