18914004 has 72 divisors (see below), whose sum is σ = 50948352. Its totient is φ = 5903040.

The previous prime is 18913991. The next prime is 18914011. The reversal of 18914004 is 40041981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43669 + ... + 44099.

It is an arithmetic number, because the mean of its divisors is an integer number (707616).

Almost surely, 2^18914004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18914004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25474176).

18914004 is an abundant number, since it is smaller than the sum of its proper divisors (32034348).

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

18914004 is a wasteful number, since it uses less digits than its factorization.

18914004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18914004 is about 4349.0233386359. The cubic root of 18914004 is about 266.4369737389.

Adding to 18914004 its reverse (40041981), we get a palindrome (58955985).

The spelling of 18914004 in words is "eighteen million, nine hundred fourteen thousand, four".