20006916 has 12 divisors (see below), whose sum is σ = 46682832. Its totient is φ = 6668968.

The previous prime is 20006887. The next prime is 20006923. The reversal of 20006916 is 61960002.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833610 + ... + 833633.

It is an arithmetic number, because the mean of its divisors is an integer number (3890236).

Almost surely, 2^20006916 is an apocalyptic number.

It is an amenable number.

20006916 is an abundant number, since it is smaller than the sum of its proper divisors (26675916).

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

20006916 is a wasteful number, since it uses less digits than its factorization.

20006916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667250 (or 1667248 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 20006916 is about 4472.9091204718. The cubic root of 20006916 is about 271.4730462408.

Adding to 20006916 its reverse (61960002), we get a palindrome (81966918).

The spelling of 20006916 in words is "twenty million, six thousand, nine hundred sixteen".