20828053 has 2 divisors, whose sum is σ = 20828054. Its totient is φ = 20828052.

The previous prime is 20828033. The next prime is 20828057. The reversal of 20828053 is 35082802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15547249 + 5280804 = 3943^2 + 2298^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20828053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20828057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10414026 + 10414027.

It is an arithmetic number, because the mean of its divisors is an integer number (10414027).

Almost surely, 2^20828053 is an apocalyptic number.

It is an amenable number.

20828053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20828053 is an equidigital number, since it uses as much as digits as its factorization.

20828053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 20828053 is about 4563.7761776844. The cubic root of 20828053 is about 275.1373550749.

The spelling of 20828053 in words is "twenty million, eight hundred twenty-eight thousand, fifty-three".