20102020199 has 4 divisors (see below), whose sum is σ = 20156794464. Its totient is φ = 20047245936.

The previous prime is 20102020193. The next prime is 20102020207. The reversal of 20102020199 is 99102020102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102020199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102020193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27386582 + ... + 27387315.

It is an arithmetic number, because the mean of its divisors is an integer number (5039198616).

Almost surely, 2^20102020199 is an apocalyptic number.

20102020199 is a deficient number, since it is larger than the sum of its proper divisors (54774265).

20102020199 is an equidigital number, since it uses as much as digits as its factorization.

20102020199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54774264.

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

The spelling of 20102020199 in words is "twenty billion, one hundred two million, twenty thousand, one hundred ninety-nine".