18477965 has 16 divisors (see below), whose sum is σ = 24373440. Its totient is φ = 13336320.

The previous prime is 18477961. The next prime is 18477967. The reversal of 18477965 is 56977481.

It is not a de Polignac number, because 18477965 - 2² = 18477961 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18477961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6437 + ... + 8853.

It is an arithmetic number, because the mean of its divisors is an integer number (1523340).

Almost surely, 2^18477965 is an apocalyptic number.

It is an amenable number.

18477965 is a deficient number, since it is larger than the sum of its proper divisors (5895475).

18477965 is a wasteful number, since it uses less digits than its factorization.

18477965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572.

The product of its digits is 423360, while the sum is 47.

The square root of 18477965 is about 4298.6003536035. The cubic root of 18477965 is about 264.3735767556.

The spelling of 18477965 in words is "eighteen million, four hundred seventy-seven thousand, nine hundred sixty-five".