18769822516 has 12 divisors (see below), whose sum is σ = 32892006532. Its totient is φ = 9372106368.

The previous prime is 18769822501. The next prime is 18769822517. The reversal of 18769822516 is 61522896781.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8789812516 + 9980010000 = 93754^2 + 99900^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18769822517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3197925 + ... + 3203788.

Almost surely, 2^18769822516 is an apocalyptic number.

It is an amenable number.

18769822516 is a deficient number, since it is larger than the sum of its proper divisors (14122184016).

18769822516 is a wasteful number, since it uses less digits than its factorization.

18769822516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6402450 (or 6402448 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 55.

The spelling of 18769822516 in words is "eighteen billion, seven hundred sixty-nine million, eight hundred twenty-two thousand, five hundred sixteen".