20153291 has 2 divisors, whose sum is σ = 20153292. Its totient is φ = 20153290.

The previous prime is 20153251. The next prime is 20153299. The reversal of 20153291 is 19235102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20153291 - 2⁶ = 20153227 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20153299) 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 as a sum of consecutive naturals, namely, 10076645 + 10076646.

It is an arithmetic number, because the mean of its divisors is an integer number (10076646).

Almost surely, 2^20153291 is an apocalyptic number.

20153291 is a deficient number, since it is larger than the sum of its proper divisors (1).

20153291 is an equidigital number, since it uses as much as digits as its factorization.

20153291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 20153291 is about 4489.2416954314. The cubic root of 20153291 is about 272.1334903797.

Adding to 20153291 its reverse (19235102), we get a palindrome (39388393).

The spelling of 20153291 in words is "twenty million, one hundred fifty-three thousand, two hundred ninety-one".