20285099 has 2 divisors, whose sum is σ = 20285100. Its totient is φ = 20285098.

The previous prime is 20285093. The next prime is 20285263. The reversal of 20285099 is 99058202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20285099 - 2¹² = 20281003 is a prime.

It is a super-2 number, since 2×20285099² = 822970482879602, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20285093) 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, 10142549 + 10142550.

It is an arithmetic number, because the mean of its divisors is an integer number (10142550).

Almost surely, 2^20285099 is an apocalyptic number.

20285099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20285099 is an equidigital number, since it uses as much as digits as its factorization.

20285099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 20285099 is about 4503.8982004481. The cubic root of 20285099 is about 272.7254773249.

The spelling of 20285099 in words is "twenty million, two hundred eighty-five thousand, ninety-nine".