18812438 has 16 divisors (see below), whose sum is σ = 29970000. Its totient is φ = 8825856.

The previous prime is 18812411. The next prime is 18812441. The reversal of 18812438 is 83421881.

It is a junction number, because it is equal to n+sod(n) for n = 18812398 and 18812407.

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, 14438 + ... + 15686.

It is an arithmetic number, because the mean of its divisors is an integer number (1873125).

Almost surely, 2^18812438 is an apocalyptic number.

18812438 is a deficient number, since it is larger than the sum of its proper divisors (11157562).

18812438 is a wasteful number, since it uses less digits than its factorization.

18812438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711.

The product of its digits is 12288, while the sum is 35.

The square root of 18812438 is about 4337.3307459773. The cubic root of 18812438 is about 265.9592056836.

The spelling of 18812438 in words is "eighteen million, eight hundred twelve thousand, four hundred thirty-eight".