20603966 has 24 divisors (see below), whose sum is σ = 33634920. Its totient is φ = 9459072.

The previous prime is 20603941. The next prime is 20603969. The reversal of 20603966 is 66930602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20603969) 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 11 ways as a sum of consecutive naturals, for example, 24440 + ... + 25268.

It is an arithmetic number, because the mean of its divisors is an integer number (1401455).

Almost surely, 2^20603966 is an apocalyptic number.

20603966 is a deficient number, since it is larger than the sum of its proper divisors (13030954).

20603966 is a wasteful number, since it uses less digits than its factorization.

20603966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 20603966 is about 4539.1591732390. The cubic root of 20603966 is about 274.1470697132.

The spelling of 20603966 in words is "twenty million, six hundred three thousand, nine hundred sixty-six".