20102099 has 2 divisors, whose sum is σ = 20102100. Its totient is φ = 20102098.

The previous prime is 20102087. The next prime is 20102111. The reversal of 20102099 is 99020102.

It is a balanced prime because it is at equal distance from previous prime (20102087) and next prime (20102111).

It is a cyclic number.

It is not a de Polignac number, because 20102099 - 2¹⁶ = 20036563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20102009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051049 + 10051050.

It is an arithmetic number, because the mean of its divisors is an integer number (10051050).

Almost surely, 2^20102099 is an apocalyptic number.

20102099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102099 is an equidigital number, since it uses as much as digits as its factorization.

20102099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 20102099 is about 4483.5364390178. The cubic root of 20102099 is about 271.9028767646.

The spelling of 20102099 in words is "twenty million, one hundred two thousand, ninety-nine".