20033491 has 2 divisors, whose sum is σ = 20033492. Its totient is φ = 20033490.

The previous prime is 20033477. The next prime is 20033527. The reversal of 20033491 is 19433002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20033491 - 2⁵ = 20033459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20033401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10016745 + 10016746.

It is an arithmetic number, because the mean of its divisors is an integer number (10016746).

Almost surely, 2^20033491 is an apocalyptic number.

20033491 is a deficient number, since it is larger than the sum of its proper divisors (1).

20033491 is an equidigital number, since it uses as much as digits as its factorization.

20033491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20033491 is about 4475.8787963929. The cubic root of 20033491 is about 271.5931914327.

Adding to 20033491 its reverse (19433002), we get a palindrome (39466493).

The spelling of 20033491 in words is "twenty million, thirty-three thousand, four hundred ninety-one".