20334491 has 2 divisors, whose sum is σ = 20334492. Its totient is φ = 20334490.

The previous prime is 20334473. The next prime is 20334511. The reversal of 20334491 is 19443302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20334491 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20334491.

It is not a weakly prime, because it can be changed into another prime (20334451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10167245 + 10167246.

It is an arithmetic number, because the mean of its divisors is an integer number (10167246).

Almost surely, 2^20334491 is an apocalyptic number.

20334491 is a deficient number, since it is larger than the sum of its proper divisors (1).

20334491 is an equidigital number, since it uses as much as digits as its factorization.

20334491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20334491 is about 4509.3781167695. The cubic root of 20334491 is about 272.9466501590.

Adding to 20334491 its reverse (19443302), we get a palindrome (39777793).

The spelling of 20334491 in words is "twenty million, three hundred thirty-four thousand, four hundred ninety-one".