18404965 has 24 divisors (see below), whose sum is σ = 24049152. Its totient is φ = 13512960.

The previous prime is 18404923. The next prime is 18404983. The reversal of 18404965 is 56940481.

It is a happy number.

It is not a de Polignac number, because 18404965 - 2⁹ = 18404453 is a prime.

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, 67780 + ... + 68050.

It is an arithmetic number, because the mean of its divisors is an integer number (1002048).

Almost surely, 2^18404965 is an apocalyptic number.

It is an amenable number.

18404965 is a deficient number, since it is larger than the sum of its proper divisors (5644187).

18404965 is a wasteful number, since it uses less digits than its factorization.

18404965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 18404965 is about 4290.1008146662. The cubic root of 18404965 is about 264.0249679860.

The spelling of 18404965 in words is "eighteen million, four hundred four thousand, nine hundred sixty-five".