18641069 has 2 divisors, whose sum is σ = 18641070. Its totient is φ = 18641068.

The previous prime is 18641057. The next prime is 18641087. The reversal of 18641069 is 96014681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17952169 + 688900 = 4237^2 + 830^2 .

It is a cyclic number.

It is not a de Polignac number, because 18641069 - 2⁸ = 18640813 is a prime.

It is a super-2 number, since 2×18641069² = 694978906925522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18641039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9320534 + 9320535.

It is an arithmetic number, because the mean of its divisors is an integer number (9320535).

Almost surely, 2^18641069 is an apocalyptic number.

It is an amenable number.

18641069 is a deficient number, since it is larger than the sum of its proper divisors (1).

18641069 is an equidigital number, since it uses as much as digits as its factorization.

18641069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 18641069 is about 4317.5304283815. The cubic root of 18641069 is about 265.1491696057.

The spelling of 18641069 in words is "eighteen million, six hundred forty-one thousand, sixty-nine".