20675313 has 6 divisors (see below), whose sum is σ = 29864354. Its totient is φ = 13783536.

The previous prime is 20675309. The next prime is 20675351. The reversal of 20675313 is 31357602.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17740944 + 2934369 = 4212^2 + 1713^2 .

It is not a de Polignac number, because 20675313 - 2² = 20675309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20675113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1148620 + ... + 1148637.

Almost surely, 2^20675313 is an apocalyptic number.

It is an amenable number.

20675313 is a deficient number, since it is larger than the sum of its proper divisors (9189041).

20675313 is a wasteful number, since it uses less digits than its factorization.

20675313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297263 (or 2297260 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 20675313 is about 4547.0114360973. The cubic root of 20675313 is about 274.4631421542.

The spelling of 20675313 in words is "twenty million, six hundred seventy-five thousand, three hundred thirteen".