20368668 has 12 divisors (see below), whose sum is σ = 47526920. Its totient is φ = 6789552.

The previous prime is 20368661. The next prime is 20368723. The reversal of 20368668 is 86686302.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20368661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848683 + ... + 848706.

Almost surely, 2^20368668 is an apocalyptic number.

It is an amenable number.

20368668 is an abundant number, since it is smaller than the sum of its proper divisors (27158252).

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

20368668 is a wasteful number, since it uses less digits than its factorization.

20368668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697396 (or 1697394 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 20368668 is about 4513.1660727254. The cubic root of 20368668 is about 273.0994820523.

The spelling of 20368668 in words is "twenty million, three hundred sixty-eight thousand, six hundred sixty-eight".