18038454 has 16 divisors (see below), whose sum is σ = 41230848. Its totient is φ = 5153832.

The previous prime is 18038453. The next prime is 18038533. The reversal of 18038454 is 45483081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18038453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214702 + ... + 214785.

It is an arithmetic number, because the mean of its divisors is an integer number (2576928).

Almost surely, 2^18038454 is an apocalyptic number.

18038454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18038454 is an abundant number, since it is smaller than the sum of its proper divisors (23192394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18038454 is a wasteful number, since it uses less digits than its factorization.

18038454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429499.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 18038454 is about 4247.1701166777. The cubic root of 18038454 is about 262.2606325866.

The spelling of 18038454 in words is "eighteen million, thirty-eight thousand, four hundred fifty-four".