19212019 has 2 divisors, whose sum is σ = 19212020. Its totient is φ = 19212018.

The previous prime is 19212001. The next prime is 19212029. The reversal of 19212019 is 91021291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19212019 - 2⁵ = 19211987 is a prime.

It is a super-2 number, since 2×19212019² = 738203348112722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19211984 and 19212002.

It is not a weakly prime, because it can be changed into another prime (19212029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9606009 + 9606010.

It is an arithmetic number, because the mean of its divisors is an integer number (9606010).

Almost surely, 2^19212019 is an apocalyptic number.

19212019 is a deficient number, since it is larger than the sum of its proper divisors (1).

19212019 is an equidigital number, since it uses as much as digits as its factorization.

19212019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 19212019 is about 4383.1517199385. The cubic root of 19212019 is about 267.8290427851.

The spelling of 19212019 in words is "nineteen million, two hundred twelve thousand, nineteen".