20100220199 has 2 divisors, whose sum is σ = 20100220200. Its totient is φ = 20100220198.

The previous prime is 20100220187. The next prime is 20100220201. The reversal of 20100220199 is 99102200102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20100220199 is a prime.

Together with 20100220201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20100220109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050110099 + 10050110100.

It is an arithmetic number, because the mean of its divisors is an integer number (10050110100).

Almost surely, 2^20100220199 is an apocalyptic number.

20100220199 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100220199 is an equidigital number, since it uses as much as digits as its factorization.

20100220199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 20100220199 in words is "twenty billion, one hundred million, two hundred twenty thousand, one hundred ninety-nine".