18882389 has 2 divisors, whose sum is σ = 18882390. Its totient is φ = 18882388.

The previous prime is 18882377. The next prime is 18882401. The reversal of 18882389 is 98328881.

It is a balanced prime because it is at equal distance from previous prime (18882377) and next prime (18882401).

It can be written as a sum of positive squares in only one way, i.e., 18879025 + 3364 = 4345^2 + 58^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18882389 is a prime.

It is a super-2 number, since 2×18882389² = 713089228694642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18882349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9441194 + 9441195.

It is an arithmetic number, because the mean of its divisors is an integer number (9441195).

Almost surely, 2^18882389 is an apocalyptic number.

It is an amenable number.

18882389 is a deficient number, since it is larger than the sum of its proper divisors (1).

18882389 is an equidigital number, since it uses as much as digits as its factorization.

18882389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 47.

The square root of 18882389 is about 4345.3870943795. The cubic root of 18882389 is about 266.2884400111.

The spelling of 18882389 in words is "eighteen million, eight hundred eighty-two thousand, three hundred eighty-nine".