20001868 has 12 divisors (see below), whose sum is σ = 35082432. Its totient is φ = 9978320.

The previous prime is 20001853. The next prime is 20001899. The reversal of 20001868 is 86810002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3580 + ... + 7267.

It is an arithmetic number, because the mean of its divisors is an integer number (2923536).

Almost surely, 2^20001868 is an apocalyptic number.

It is an amenable number.

20001868 is a deficient number, since it is larger than the sum of its proper divisors (15080564).

20001868 is a wasteful number, since it uses less digits than its factorization.

20001868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11312 (or 11310 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 20001868 is about 4472.3447988723. The cubic root of 20001868 is about 271.4502122832.

The spelling of 20001868 in words is "twenty million, one thousand, eight hundred sixty-eight".