18808519252 has 24 divisors (see below), whose sum is σ = 33744490920. Its totient is φ = 9167600640.

The previous prime is 18808519243. The next prime is 18808519309. The reversal of 18808519252 is 25291580881.

It can be written as a sum of positive squares in 4 ways, for example, as 3547870096 + 15260649156 = 59564^2 + 123534^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18808519196 and 18808519205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164524 + ... + 254332.

It is an arithmetic number, because the mean of its divisors is an integer number (1406020455).

Almost surely, 2^18808519252 is an apocalyptic number.

It is an amenable number.

18808519252 is a deficient number, since it is larger than the sum of its proper divisors (14935971668).

18808519252 is a wasteful number, since it uses less digits than its factorization.

18808519252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91131 (or 91129 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 49.

The spelling of 18808519252 in words is "eighteen billion, eight hundred eight million, five hundred nineteen thousand, two hundred fifty-two".