20356153 has 2 divisors, whose sum is σ = 20356154. Its totient is φ = 20356152.

The previous prime is 20356139. The next prime is 20356183. The reversal of 20356153 is 35165302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19963024 + 393129 = 4468^2 + 627^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20356153 is a prime.

It is not a weakly prime, because it can be changed into another prime (20356103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10178076 + 10178077.

It is an arithmetic number, because the mean of its divisors is an integer number (10178077).

Almost surely, 2^20356153 is an apocalyptic number.

It is an amenable number.

20356153 is a deficient number, since it is larger than the sum of its proper divisors (1).

20356153 is an equidigital number, since it uses as much as digits as its factorization.

20356153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 20356153 is about 4511.7793607401. The cubic root of 20356153 is about 273.0435376273.

The spelling of 20356153 in words is "twenty million, three hundred fifty-six thousand, one hundred fifty-three".