18148582388 has 24 divisors (see below), whose sum is σ = 32242994784. Its totient is φ = 8936373600.

The previous prime is 18148582379. The next prime is 18148582409. The reversal of 18148582388 is 88328584181.

It is a happy number.

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, 1295783 + ... + 1309713.

It is an arithmetic number, because the mean of its divisors is an integer number (1343458116).

Almost surely, 2^18148582388 is an apocalyptic number.

It is an amenable number.

18148582388 is a deficient number, since it is larger than the sum of its proper divisors (14094412396).

18148582388 is a wasteful number, since it uses less digits than its factorization.

18148582388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18863 (or 18861 counting only the distinct ones).

The product of its digits is 3932160, while the sum is 56.

The spelling of 18148582388 in words is "eighteen billion, one hundred forty-eight million, five hundred eighty-two thousand, three hundred eighty-eight".