20678356 has 12 divisors (see below), whose sum is σ = 37028992. Its totient is φ = 10098648.

The previous prime is 20678353. The next prime is 20678381. The reversal of 20678356 is 65387602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20678351) 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, 59940 + ... + 60283.

Almost surely, 2^20678356 is an apocalyptic number.

It is an amenable number.

20678356 is a deficient number, since it is larger than the sum of its proper divisors (16350636).

20678356 is a wasteful number, since it uses less digits than its factorization.

20678356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120270 (or 120268 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 20678356 is about 4547.3460391749. The cubic root of 20678356 is about 274.4766066883.

The spelling of 20678356 in words is "twenty million, six hundred seventy-eight thousand, three hundred fifty-six".