1918252019 has 2 divisors, whose sum is σ = 1918252020. Its totient is φ = 1918252018.

The previous prime is 1918251997. The next prime is 1918252051. The reversal of 1918252019 is 9102528191.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1918252019 - 2²⁰ = 1917203443 is a prime.

It is a super-2 number, since 2×1918252019² = 7359381616795152722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1918282019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959126009 + 959126010.

It is an arithmetic number, because the mean of its divisors is an integer number (959126010).

Almost surely, 2^1918252019 is an apocalyptic number.

1918252019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918252019 is an equidigital number, since it uses as much as digits as its factorization.

1918252019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 1918252019 is about 43797.8540456036. The cubic root of 1918252019 is about 1242.5157084598.

The spelling of 1918252019 in words is "one billion, nine hundred eighteen million, two hundred fifty-two thousand, nineteen".