19820153 has 2 divisors, whose sum is σ = 19820154. Its totient is φ = 19820152.

The previous prime is 19820117. The next prime is 19820159. The reversal of 19820153 is 35102891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18003049 + 1817104 = 4243^2 + 1348^2 .

It is a cyclic number.

It is not a de Polignac number, because 19820153 - 2⁸ = 19819897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19820159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9910076 + 9910077.

It is an arithmetic number, because the mean of its divisors is an integer number (9910077).

Almost surely, 2^19820153 is an apocalyptic number.

It is an amenable number.

19820153 is a deficient number, since it is larger than the sum of its proper divisors (1).

19820153 is an equidigital number, since it uses as much as digits as its factorization.

19820153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 19820153 is about 4451.9830412974. The cubic root of 19820153 is about 270.6256774692.

The spelling of 19820153 in words is "nineteen million, eight hundred twenty thousand, one hundred fifty-three".