20688152 has 16 divisors (see below), whose sum is σ = 38990160. Its totient is φ = 10290784.

The previous prime is 20688121. The next prime is 20688197. The reversal of 20688152 is 25188602.

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, 4988 + ... + 8139.

It is an arithmetic number, because the mean of its divisors is an integer number (2436885).

Almost surely, 2^20688152 is an apocalyptic number.

It is an amenable number.

20688152 is a deficient number, since it is larger than the sum of its proper divisors (18302008).

20688152 is a wasteful number, since it uses less digits than its factorization.

20688152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13330 (or 13326 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 20688152 is about 4548.4230234225. The cubic root of 20688152 is about 274.5199426345.

The spelling of 20688152 in words is "twenty million, six hundred eighty-eight thousand, one hundred fifty-two".