20617670 has 16 divisors (see below), whose sum is σ = 38017728. Its totient is φ = 8045760.

The previous prime is 20617669. The next prime is 20617673. The reversal of 20617670 is 7671602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20617673) 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 7 ways as a sum of consecutive naturals, for example, 24734 + ... + 25553.

It is an arithmetic number, because the mean of its divisors is an integer number (2376108).

Almost surely, 2^20617670 is an apocalyptic number.

20617670 is a deficient number, since it is larger than the sum of its proper divisors (17400058).

20617670 is a wasteful number, since it uses less digits than its factorization.

20617670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50335.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 20617670 is about 4540.6684529924. The cubic root of 20617670 is about 274.2078359888.

The spelling of 20617670 in words is "twenty million, six hundred seventeen thousand, six hundred seventy".