20553733 has 2 divisors, whose sum is σ = 20553734. Its totient is φ = 20553732.

The previous prime is 20553727. The next prime is 20553739. The reversal of 20553733 is 33735502.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (20553727) and next prime (20553739).

It can be written as a sum of positive squares in only one way, i.e., 19775809 + 777924 = 4447^2 + 882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20553733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20553739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10276866 + 10276867.

It is an arithmetic number, because the mean of its divisors is an integer number (10276867).

Almost surely, 2^20553733 is an apocalyptic number.

It is an amenable number.

20553733 is a deficient number, since it is larger than the sum of its proper divisors (1).

20553733 is an equidigital number, since it uses as much as digits as its factorization.

20553733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 28.

The square root of 20553733 is about 4533.6225030322. The cubic root of 20553733 is about 273.9240958697.

The spelling of 20553733 in words is "twenty million, five hundred fifty-three thousand, seven hundred thirty-three".