20246864 has 80 divisors (see below), whose sum is σ = 46443456. Its totient is φ = 8448000.

The previous prime is 20246833. The next prime is 20246867. The reversal of 20246864 is 46864202.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20246864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20246867) 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 15 ways as a sum of consecutive naturals, for example, 200414 + ... + 200514.

Almost surely, 2^20246864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20246864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23221728).

20246864 is an abundant number, since it is smaller than the sum of its proper divisors (26196592).

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

20246864 is a wasteful number, since it uses less digits than its factorization.

20246864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 20246864 is about 4499.6515420641. The cubic root of 20246864 is about 272.5540178523.

It can be divided in two parts, 2024 and 6864, that added together give a palindrome (8888).

The spelling of 20246864 in words is "twenty million, two hundred forty-six thousand, eight hundred sixty-four".