18860769 has 20 divisors (see below), whose sum is σ = 29834244. Its totient is φ = 11833344.

The previous prime is 18860767. The next prime is 18860797. The reversal of 18860769 is 96706881.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6350400 + 12510369 = 2520^2 + 3537^2 .

It is not a de Polignac number, because 18860769 - 2¹ = 18860767 is a prime.

It is a super-2 number, since 2×18860769² = 711457214542722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18860761) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5472 + ... + 8225.

Almost surely, 2^18860769 is an apocalyptic number.

It is an amenable number.

18860769 is a deficient number, since it is larger than the sum of its proper divisors (10973475).

18860769 is a wasteful number, since it uses less digits than its factorization.

18860769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13726 (or 13717 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 18860769 is about 4342.8986863614. The cubic root of 18860769 is about 266.1867693530.

The spelling of 18860769 in words is "eighteen million, eight hundred sixty thousand, seven hundred sixty-nine".