20367664 has 20 divisors (see below), whose sum is σ = 39834504. Its totient is φ = 10087808.

The previous prime is 20367647. The next prime is 20367671. The reversal of 20367664 is 46676302.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4237 + ... + 7660.

Almost surely, 2^20367664 is an apocalyptic number.

It is an amenable number.

20367664 is a deficient number, since it is larger than the sum of its proper divisors (19466840).

20367664 is a wasteful number, since it uses less digits than its factorization.

20367664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12012 (or 12006 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 20367664 is about 4513.0548412356. The cubic root of 20367664 is about 273.0949948274.

The spelling of 20367664 in words is "twenty million, three hundred sixty-seven thousand, six hundred sixty-four".