20655416 has 8 divisors (see below), whose sum is σ = 38728920. Its totient is φ = 10327704.

The previous prime is 20655379. The next prime is 20655433. The reversal of 20655416 is 61455602.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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, 1290956 + ... + 1290971.

It is an arithmetic number, because the mean of its divisors is an integer number (4841115).

Almost surely, 2^20655416 is an apocalyptic number.

It is an amenable number.

20655416 is a deficient number, since it is larger than the sum of its proper divisors (18073504).

20655416 is a wasteful number, since it uses less digits than its factorization.

20655416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581933 (or 2581929 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 20655416 is about 4544.8229888523. The cubic root of 20655416 is about 274.3750701964.

The spelling of 20655416 in words is "twenty million, six hundred fifty-five thousand, four hundred sixteen".