1918530469 has 2 divisors, whose sum is σ = 1918530470. Its totient is φ = 1918530468.

The previous prime is 1918530433. The next prime is 1918530479. The reversal of 1918530469 is 9640358191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1727399844 + 191130625 = 41562^2 + 13825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1918530469 - 2¹⁵ = 1918497701 is a prime.

It is a super-2 number, since 2×1918530469² = 7361518320962719922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1918530479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959265234 + 959265235.

It is an arithmetic number, because the mean of its divisors is an integer number (959265235).

Almost surely, 2^1918530469 is an apocalyptic number.

It is an amenable number.

1918530469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918530469 is an equidigital number, since it uses as much as digits as its factorization.

1918530469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 1918530469 is about 43801.0327389663. The cubic root of 1918530469 is about 1242.5758259967.

The spelling of 1918530469 in words is "one billion, nine hundred eighteen million, five hundred thirty thousand, four hundred sixty-nine".