20011000019 has 2 divisors, whose sum is σ = 20011000020. Its totient is φ = 20011000018.

The previous prime is 20011000003. The next prime is 20011000021. The reversal of 20011000019 is 91000011002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20011000019 - 2⁴ = 20011000003 is a prime.

It is a super-2 number, since 2×20011000019² (a number of 21 digits) contains 22 as substring.

Together with 20011000021, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20010999967 and 20011000012.

It is not a weakly prime, because it can be changed into another prime (20011000039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005500009 + 10005500010.

It is an arithmetic number, because the mean of its divisors is an integer number (10005500010).

Almost surely, 2^20011000019 is an apocalyptic number.

20011000019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011000019 is an equidigital number, since it uses as much as digits as its factorization.

20011000019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 14.

The spelling of 20011000019 in words is "twenty billion, eleven million, nineteen", and thus it is an aban number and an uban number.