18948069 has 24 divisors (see below), whose sum is σ = 31753280. Its totient is φ = 10665864.

The previous prime is 18948043. The next prime is 18948089. The reversal of 18948069 is 96084981.

18948069 = 7² + 8² + ... + 384².

It is not a de Polignac number, because 18948069 - 2⁸ = 18947813 is a prime.

It is a super-2 number, since 2×18948069² = 718058637657522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18948029) 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 in 23 ways as a sum of consecutive naturals, for example, 282774 + ... + 282840.

Almost surely, 2^18948069 is an apocalyptic number.

It is an amenable number.

18948069 is a deficient number, since it is larger than the sum of its proper divisors (12805211).

18948069 is an frugal number, since it uses more digits than its factorization.

18948069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 18948069 is about 4352.9379733693. The cubic root of 18948069 is about 266.5968329291.

The spelling of 18948069 in words is "eighteen million, nine hundred forty-eight thousand, sixty-nine".