18941004 has 18 divisors (see below), whose sum is σ = 47878740. Its totient is φ = 6313656.

The previous prime is 18940993. The next prime is 18941011. The reversal of 18941004 is 40014981.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263034 + ... + 263105.

It is an arithmetic number, because the mean of its divisors is an integer number (2659930).

Almost surely, 2^18941004 is an apocalyptic number.

It is an amenable number.

18941004 is an abundant number, since it is smaller than the sum of its proper divisors (28937736).

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

18941004 is a wasteful number, since it uses less digits than its factorization.

18941004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526149 (or 526144 counting only the distinct ones).

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

The square root of 18941004 is about 4352.1263768416. The cubic root of 18941004 is about 266.5636942705.

Adding to 18941004 its reverse (40014981), we get a palindrome (58955985).

The spelling of 18941004 in words is "eighteen million, nine hundred forty-one thousand, four".