20675764 has 6 divisors (see below), whose sum is σ = 36182594. Its totient is φ = 10337880.

The previous prime is 20675761. The next prime is 20675779. The reversal of 20675764 is 46757602.

It can be written as a sum of positive squares in only one way, i.e., 19448100 + 1227664 = 4410^2 + 1108^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2584467 + ... + 2584474.

Almost surely, 2^20675764 is an apocalyptic number.

It is an amenable number.

20675764 is a deficient number, since it is larger than the sum of its proper divisors (15506830).

20675764 is a wasteful number, since it uses less digits than its factorization.

20675764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168945 (or 5168943 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 20675764 is about 4547.0610288405. The cubic root of 20675764 is about 274.4651378028.

The spelling of 20675764 in words is "twenty million, six hundred seventy-five thousand, seven hundred sixty-four".