20007916 has 6 divisors (see below), whose sum is σ = 35013860. Its totient is φ = 10003956.

The previous prime is 20007881. The next prime is 20007919. The reversal of 20007916 is 61970002.

It is not an unprimeable number, because it can be changed into a prime (20007919) 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 as a sum of consecutive naturals, namely, 2500986 + ... + 2500993.

Almost surely, 2^20007916 is an apocalyptic number.

It is an amenable number.

20007916 is a deficient number, since it is larger than the sum of its proper divisors (15005944).

20007916 is a wasteful number, since it uses less digits than its factorization.

20007916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001983 (or 5001981 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 20007916 is about 4473.0209031481. The cubic root of 20007916 is about 271.4775691521.

Adding to 20007916 its reverse (61970002), we get a palindrome (81977918).

The spelling of 20007916 in words is "twenty million, seven thousand, nine hundred sixteen".