20000651 has 4 divisors (see below), whose sum is σ = 21818904. Its totient is φ = 18182400.

The previous prime is 20000641. The next prime is 20000671. The reversal of 20000651 is 15600002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20000651 - 2¹⁴ = 19984267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20000621) 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, 909110 + ... + 909131.

It is an arithmetic number, because the mean of its divisors is an integer number (5454726).

Almost surely, 2^20000651 is an apocalyptic number.

20000651 is a deficient number, since it is larger than the sum of its proper divisors (1818253).

20000651 is a wasteful number, since it uses less digits than its factorization.

20000651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818252.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 20000651 is about 4472.2087384200. The cubic root of 20000651 is about 271.4447067707. Note that the first 3 decimals are identical.

Adding to 20000651 its reverse (15600002), we get a palindrome (35600653).

The spelling of 20000651 in words is "twenty million, six hundred fifty-one", and thus it is an aban number.