18869769 has 12 divisors (see below), whose sum is σ = 27295216. Its totient is φ = 12561912.

The previous prime is 18869761. The next prime is 18869783. The reversal of 18869769 is 96796881.

It is not a de Polignac number, because 18869769 - 2³ = 18869761 is a prime.

It is a super-2 number, since 2×18869769² = 712136364226722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18869761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9174 + ... + 11040.

Almost surely, 2^18869769 is an apocalyptic number.

It is an amenable number.

18869769 is a deficient number, since it is larger than the sum of its proper divisors (8425447).

18869769 is a wasteful number, since it uses less digits than its factorization.

18869769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996 (or 2993 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 18869769 is about 4343.9347370788. The cubic root of 18869769 is about 266.2291023736.

The spelling of 18869769 in words is "eighteen million, eight hundred sixty-nine thousand, seven hundred sixty-nine".