20011099939 has 2 divisors, whose sum is σ = 20011099940. Its totient is φ = 20011099938.

The previous prime is 20011099937. The next prime is 20011099949. The reversal of 20011099939 is 93999011002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20011099939 - 2¹ = 20011099937 is a prime.

Together with 20011099937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20011099895 and 20011099904.

It is not a weakly prime, because it can be changed into another prime (20011099937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005549969 + 10005549970.

It is an arithmetic number, because the mean of its divisors is an integer number (10005549970).

Almost surely, 2^20011099939 is an apocalyptic number.

20011099939 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011099939 is an equidigital number, since it uses as much as digits as its factorization.

20011099939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 43.

The spelling of 20011099939 in words is "twenty billion, eleven million, ninety-nine thousand, nine hundred thirty-nine".