20045953 has 2 divisors, whose sum is σ = 20045954. Its totient is φ = 20045952.

The previous prime is 20045951. The next prime is 20045957. The reversal of 20045953 is 35954002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16744464 + 3301489 = 4092^2 + 1817^2 .

It is a cyclic number.

It is not a de Polignac number, because 20045953 - 2¹ = 20045951 is a prime.

Together with 20045951, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20045951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10022976 + 10022977.

It is an arithmetic number, because the mean of its divisors is an integer number (10022977).

Almost surely, 2^20045953 is an apocalyptic number.

It is an amenable number.

20045953 is a deficient number, since it is larger than the sum of its proper divisors (1).

20045953 is an equidigital number, since it uses as much as digits as its factorization.

20045953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 20045953 is about 4477.2707088136. The cubic root of 20045953 is about 271.6494953621.

Adding to 20045953 its reverse (35954002), we get a palindrome (55999955).

The spelling of 20045953 in words is "twenty million, forty-five thousand, nine hundred fifty-three".