18650465 has 4 divisors (see below), whose sum is σ = 22380564. Its totient is φ = 14920368.

The previous prime is 18650461. The next prime is 18650473. The reversal of 18650465 is 56405681.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56405681 = 1693 ⋅33317.

It can be written as a sum of positive squares in 2 ways, for example, as 5740816 + 12909649 = 2396^2 + 3593^2 .

It is a cyclic number.

It is not a de Polignac number, because 18650465 - 2² = 18650461 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18650461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1865042 + ... + 1865051.

It is an arithmetic number, because the mean of its divisors is an integer number (5595141).

Almost surely, 2^18650465 is an apocalyptic number.

It is an amenable number.

18650465 is a deficient number, since it is larger than the sum of its proper divisors (3730099).

18650465 is an equidigital number, since it uses as much as digits as its factorization.

18650465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3730098.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 18650465 is about 4318.6184133355. The cubic root of 18650465 is about 265.1937114563.

The spelling of 18650465 in words is "eighteen million, six hundred fifty thousand, four hundred sixty-five".