18463438 has 16 divisors (see below), whose sum is σ = 31722624. Its totient is φ = 7895160.

The previous prime is 18463429. The next prime is 18463441. The reversal of 18463438 is 83436481.

It is a junction number, because it is equal to n+sod(n) for n = 18463397 and 18463406.

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, 6453 + ... + 8863.

It is an arithmetic number, because the mean of its divisors is an integer number (1982664).

Almost surely, 2^18463438 is an apocalyptic number.

18463438 is a deficient number, since it is larger than the sum of its proper divisors (13259186).

18463438 is a wasteful number, since it uses less digits than its factorization.

18463438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967.

The product of its digits is 55296, while the sum is 37.

The square root of 18463438 is about 4296.9102853097. The cubic root of 18463438 is about 264.3042768833.

The spelling of 18463438 in words is "eighteen million, four hundred sixty-three thousand, four hundred thirty-eight".