20657332 has 12 divisors (see below), whose sum is σ = 38053120. Its totient is φ = 9785016.

The previous prime is 20657327. The next prime is 20657339. The reversal of 20657332 is 23375602.

It is a self number, because there is not a number n which added to its sum of digits gives 20657332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20657339) 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, 135828 + ... + 135979.

Almost surely, 2^20657332 is an apocalyptic number.

It is an amenable number.

20657332 is a deficient number, since it is larger than the sum of its proper divisors (17395788).

20657332 is a wasteful number, since it uses less digits than its factorization.

20657332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271830 (or 271828 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 20657332 is about 4545.0337732519. The cubic root of 20657332 is about 274.3835536273.

The spelling of 20657332 in words is "twenty million, six hundred fifty-seven thousand, three hundred thirty-two".