18754669 has 2 divisors, whose sum is σ = 18754670. Its totient is φ = 18754668.

The previous prime is 18754667. The next prime is 18754699. The reversal of 18754669 is 96645781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16305444 + 2449225 = 4038^2 + 1565^2 .

It is a cyclic number.

It is not a de Polignac number, because 18754669 - 2¹ = 18754667 is a prime.

It is a super-2 number, since 2×18754669² = 703475218599122, which contains 22 as substring.

Together with 18754667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18754661) 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, 9377334 + 9377335.

It is an arithmetic number, because the mean of its divisors is an integer number (9377335).

Almost surely, 2^18754669 is an apocalyptic number.

It is an amenable number.

18754669 is a deficient number, since it is larger than the sum of its proper divisors (1).

18754669 is an equidigital number, since it uses as much as digits as its factorization.

18754669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The square root of 18754669 is about 4330.6661150451. Note that the first 3 decimals coincide. The cubic root of 18754669 is about 265.6866918116.

The spelling of 18754669 in words is "eighteen million, seven hundred fifty-four thousand, six hundred sixty-nine".