20694188 has 12 divisors (see below), whose sum is σ = 36366792. Its totient is φ = 10303680.

The previous prime is 20694187. The next prime is 20694199. The reversal of 20694188 is 88149602.

It is not an unprimeable number, because it can be changed into a prime (20694187) 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 3 ways as a sum of consecutive naturals, for example, 9770 + ... + 11697.

It is an arithmetic number, because the mean of its divisors is an integer number (3030566).

Almost surely, 2^20694188 is an apocalyptic number.

It is an amenable number.

20694188 is a deficient number, since it is larger than the sum of its proper divisors (15672604).

20694188 is a wasteful number, since it uses less digits than its factorization.

20694188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21712 (or 21710 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 20694188 is about 4549.0865017056. The cubic root of 20694188 is about 274.5466381275.

The spelling of 20694188 in words is "twenty million, six hundred ninety-four thousand, one hundred eighty-eight".