33440023 has 4 divisors (see below), whose sum is σ = 33480720. Its totient is φ = 33399328.

The previous prime is 33440021. The next prime is 33440027. The reversal of 33440023 is 32004433.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32004433 = 137 ⋅233609.

It is a cyclic number.

It is not a de Polignac number, because 33440023 - 2¹ = 33440021 is a prime.

It is a super-2 number, since 2×33440023² = 2236470276481058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33440021) 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, 19090 + ... + 20767.

It is an arithmetic number, because the mean of its divisors is an integer number (8370180).

Almost surely, 2^33440023 is an apocalyptic number.

33440023 is a deficient number, since it is larger than the sum of its proper divisors (40697).

33440023 is an equidigital number, since it uses as much as digits as its factorization.

33440023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40696.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 33440023 is about 5782.7349065991. The cubic root of 33440023 is about 322.1727883252.

Adding to 33440023 its reverse (32004433), we get a palindrome (65444456).

The spelling of 33440023 in words is "thirty-three million, four hundred forty thousand, twenty-three".