20464418 has 16 divisors (see below), whose sum is σ = 33389496. Its totient is φ = 9350400.

The previous prime is 20464417. The next prime is 20464421. The reversal of 20464418 is 81446402.

It can be written as a sum of positive squares in 4 ways, for example, as 20457529 + 6889 = 4523^2 + 83^2 .

It is not an unprimeable number, because it can be changed into a prime (20464417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1271 + ... + 6522.

Almost surely, 2^20464418 is an apocalyptic number.

20464418 is a deficient number, since it is larger than the sum of its proper divisors (12925078).

20464418 is a wasteful number, since it uses less digits than its factorization.

20464418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7909.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 20464418 is about 4523.7614879655. The cubic root of 20464418 is about 273.5267462455.

The spelling of 20464418 in words is "twenty million, four hundred sixty-four thousand, four hundred eighteen".