20806616 has 16 divisors (see below), whose sum is σ = 39099240. Its totient is φ = 10380160.

The previous prime is 20806613. The next prime is 20806619. The reversal of 20806616 is 61660802.

It is an interprime number because it is at equal distance from previous prime (20806613) and next prime (20806619).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20806613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280 + ... + 6576.

Almost surely, 2^20806616 is an apocalyptic number.

It is an amenable number.

20806616 is a deficient number, since it is larger than the sum of its proper divisors (18292624).

20806616 is a wasteful number, since it uses less digits than its factorization.

20806616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5794 (or 5790 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20806616 is about 4561.4269697102. The cubic root of 20806616 is about 275.0429288354.

The spelling of 20806616 in words is "twenty million, eight hundred six thousand, six hundred sixteen".