18861404 has 12 divisors (see below), whose sum is σ = 33049128. Its totient is φ = 9418800.

The previous prime is 18861377. The next prime is 18861407. The reversal of 18861404 is 40416881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18861407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1259 + ... + 6269.

It is an arithmetic number, because the mean of its divisors is an integer number (2754094).

Almost surely, 2^18861404 is an apocalyptic number.

It is an amenable number.

18861404 is a deficient number, since it is larger than the sum of its proper divisors (14187724).

18861404 is a wasteful number, since it uses less digits than its factorization.

18861404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5956 (or 5954 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 18861404 is about 4342.9717935994. The cubic root of 18861404 is about 266.1897566243.

The spelling of 18861404 in words is "eighteen million, eight hundred sixty-one thousand, four hundred four".