20056499 has 2 divisors, whose sum is σ = 20056500. Its totient is φ = 20056498.

The previous prime is 20056471. The next prime is 20056511. The reversal of 20056499 is 99465002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20056499 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20056459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10028249 + 10028250.

It is an arithmetic number, because the mean of its divisors is an integer number (10028250).

Almost surely, 2^20056499 is an apocalyptic number.

20056499 is a deficient number, since it is larger than the sum of its proper divisors (1).

20056499 is an equidigital number, since it uses as much as digits as its factorization.

20056499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 20056499 is about 4478.4482803757. The cubic root of 20056499 is about 271.6971244827.

The spelling of 20056499 in words is "twenty million, fifty-six thousand, four hundred ninety-nine".