20336418 has 24 divisors (see below), whose sum is σ = 44895708. Its totient is φ = 6650592.

The previous prime is 20336401. The next prime is 20336419. The reversal of 20336418 is 81463302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15657849 + 4678569 = 3957^2 + 2163^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20336391 and 20336400.

It is not an unprimeable number, because it can be changed into a prime (20336419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9705 + ... + 11612.

Almost surely, 2^20336418 is an apocalyptic number.

20336418 is an abundant number, since it is smaller than the sum of its proper divisors (24559290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20336418 is a wasteful number, since it uses less digits than its factorization.

20336418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21378 (or 21375 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20336418 is about 4509.5917775337. The cubic root of 20336418 is about 272.9552718252.

The spelling of 20336418 in words is "twenty million, three hundred thirty-six thousand, four hundred eighteen".