20957593 has 2 divisors, whose sum is σ = 20957594. Its totient is φ = 20957592.

The previous prime is 20957561. The next prime is 20957603. The reversal of 20957593 is 39575902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19784704 + 1172889 = 4448^2 + 1083^2 .

It is a cyclic number.

It is not a de Polignac number, because 20957593 - 2⁵ = 20957561 is a prime.

It is not a weakly prime, because it can be changed into another prime (20952593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10478796 + 10478797.

It is an arithmetic number, because the mean of its divisors is an integer number (10478797).

Almost surely, 2^20957593 is an apocalyptic number.

It is an amenable number.

20957593 is a deficient number, since it is larger than the sum of its proper divisors (1).

20957593 is an equidigital number, since it uses as much as digits as its factorization.

20957593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 20957593 is about 4577.9463736483. The cubic root of 20957593 is about 275.7065818598.

The spelling of 20957593 in words is "twenty million, nine hundred fifty-seven thousand, five hundred ninety-three".