20341664 has 36 divisors (see below), whose sum is σ = 46589634. Its totient is φ = 8717184.

The previous prime is 20341661. The next prime is 20341667. The reversal of 20341664 is 46614302.

It is an interprime number because it is at equal distance from previous prime (20341661) and next prime (20341667).

It can be written as a sum of positive squares in only one way, i.e., 20322064 + 19600 = 4508^2 + 140^2 .

It is not an unprimeable number, because it can be changed into a prime (20341661) 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 5 ways as a sum of consecutive naturals, for example, 4919 + ... + 8054.

Almost surely, 2^20341664 is an apocalyptic number.

It is an amenable number.

20341664 is an abundant number, since it is smaller than the sum of its proper divisors (26247970).

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

20341664 is a wasteful number, since it uses less digits than its factorization.

20341664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12997 (or 12982 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20341664 is about 4510.1733891282. The cubic root of 20341664 is about 272.9787404001.

Adding to 20341664 its reverse (46614302), we get a palindrome (66955966).

The spelling of 20341664 in words is "twenty million, three hundred forty-one thousand, six hundred sixty-four".