20533042 has 8 divisors (see below), whose sum is σ = 32611356. Its totient is φ = 9662592.

The previous prime is 20533001. The next prime is 20533049. The reversal of 20533042 is 24033502.

It can be written as a sum of positive squares in 2 ways, for example, as 19368801 + 1164241 = 4401^2 + 1079^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20533049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301923 + ... + 301990.

Almost surely, 2^20533042 is an apocalyptic number.

20533042 is a deficient number, since it is larger than the sum of its proper divisors (12078314).

20533042 is a wasteful number, since it uses less digits than its factorization.

20533042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603932.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 20533042 is about 4531.3399784170. The cubic root of 20533042 is about 273.8321471808.

Adding to 20533042 its reverse (24033502), we get a palindrome (44566544).

The spelling of 20533042 in words is "twenty million, five hundred thirty-three thousand, forty-two".