20888953 has 2 divisors, whose sum is σ = 20888954. Its totient is φ = 20888952.

The previous prime is 20888941. The next prime is 20888963. The reversal of 20888953 is 35988802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12981609 + 7907344 = 3603^2 + 2812^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20888953 is a prime.

It is not a weakly prime, because it can be changed into another prime (20888963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10444476 + 10444477.

It is an arithmetic number, because the mean of its divisors is an integer number (10444477).

Almost surely, 2^20888953 is an apocalyptic number.

It is an amenable number.

20888953 is a deficient number, since it is larger than the sum of its proper divisors (1).

20888953 is an equidigital number, since it uses as much as digits as its factorization.

20888953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 20888953 is about 4570.4434139370. The cubic root of 20888953 is about 275.4052559415.

The spelling of 20888953 in words is "twenty million, eight hundred eighty-eight thousand, nine hundred fifty-three".