20937953 has 2 divisors, whose sum is σ = 20937954. Its totient is φ = 20937952.

The previous prime is 20937901. The next prime is 20938013. The reversal of 20937953 is 35973902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15311569 + 5626384 = 3913^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 20937953 - 2¹⁶ = 20872417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20937253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10468976 + 10468977.

It is an arithmetic number, because the mean of its divisors is an integer number (10468977).

Almost surely, 2^20937953 is an apocalyptic number.

It is an amenable number.

20937953 is a deficient number, since it is larger than the sum of its proper divisors (1).

20937953 is an equidigital number, since it uses as much as digits as its factorization.

20937953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 38.

The square root of 20937953 is about 4575.8008042309. The cubic root of 20937953 is about 275.6204305919.

The spelling of 20937953 in words is "twenty million, nine hundred thirty-seven thousand, nine hundred fifty-three".