20163788 has 12 divisors (see below), whose sum is σ = 37143960. Its totient is φ = 9551232.

The previous prime is 20163763. The next prime is 20163791. The reversal of 20163788 is 88736102.

It is a plaindrome in base 16.

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 in 3 ways as a sum of consecutive naturals, for example, 132581 + ... + 132732.

It is an arithmetic number, because the mean of its divisors is an integer number (3095330).

Almost surely, 2^20163788 is an apocalyptic number.

It is an amenable number.

20163788 is a deficient number, since it is larger than the sum of its proper divisors (16980172).

20163788 is a wasteful number, since it uses less digits than its factorization.

20163788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265336 (or 265334 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 20163788 is about 4490.4106716424. The cubic root of 20163788 is about 272.1807298014.

The spelling of 20163788 in words is "twenty million, one hundred sixty-three thousand, seven hundred eighty-eight".