20442533 has 8 divisors (see below), whose sum is σ = 20808000. Its totient is φ = 20079360.

The previous prime is 20442523. The next prime is 20442557. The reversal of 20442533 is 33524402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20442533 - 2¹⁴ = 20426149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20442499 and 20442508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35141 + ... + 35717.

It is an arithmetic number, because the mean of its divisors is an integer number (2601000).

Almost surely, 2^20442533 is an apocalyptic number.

It is an amenable number.

20442533 is a deficient number, since it is larger than the sum of its proper divisors (365467).

20442533 is an equidigital number, since it uses as much as digits as its factorization.

20442533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 20442533 is about 4521.3419468118. The cubic root of 20442533 is about 273.4292067340.

Adding to 20442533 its reverse (33524402), we get a palindrome (53966935).

The spelling of 20442533 in words is "twenty million, four hundred forty-two thousand, five hundred thirty-three".