20450699 has 2 divisors, whose sum is σ = 20450700. Its totient is φ = 20450698.

The previous prime is 20450693. The next prime is 20450701. The reversal of 20450699 is 99605402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20450699 is a prime.

Together with 20450701, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20450693) 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, 10225349 + 10225350.

It is an arithmetic number, because the mean of its divisors is an integer number (10225350).

Almost surely, 2^20450699 is an apocalyptic number.

20450699 is a deficient number, since it is larger than the sum of its proper divisors (1).

20450699 is an equidigital number, since it uses as much as digits as its factorization.

20450699 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 20450699 is about 4522.2449071230. The cubic root of 20450699 is about 273.4656100124.

The spelling of 20450699 in words is "twenty million, four hundred fifty thousand, six hundred ninety-nine".