20366518 has 16 divisors (see below), whose sum is σ = 32335920. Its totient is φ = 9593856.

The previous prime is 20366513. The next prime is 20366531. The reversal of 20366518 is 81566302.

It is a self number, because there is not a number n which added to its sum of digits gives 20366518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20366513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5946 + ... + 8722.

It is an arithmetic number, because the mean of its divisors is an integer number (2020995).

Almost surely, 2^20366518 is an apocalyptic number.

20366518 is a deficient number, since it is larger than the sum of its proper divisors (11969402).

20366518 is a wasteful number, since it uses less digits than its factorization.

20366518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20366518 is about 4512.9278744514. The cubic root of 20366518 is about 273.0898727749.

The spelling of 20366518 in words is "twenty million, three hundred sixty-six thousand, five hundred eighteen".