20011012019 has 2 divisors, whose sum is σ = 20011012020. Its totient is φ = 20011012018.

The previous prime is 20011011961. The next prime is 20011012033. The reversal of 20011012019 is 91021011002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011012019 is a prime.

It is a super-2 number, since 2×20011012019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20011011988 and 20011012006.

It is not a weakly prime, because it can be changed into another prime (20011012079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005506009 + 10005506010.

It is an arithmetic number, because the mean of its divisors is an integer number (10005506010).

Almost surely, 2^20011012019 is an apocalyptic number.

20011012019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011012019 is an equidigital number, since it uses as much as digits as its factorization.

20011012019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 20011012019 in words is "twenty billion, eleven million, twelve thousand, nineteen".