19945153 has 2 divisors, whose sum is σ = 19945154. Its totient is φ = 19945152.

The previous prime is 19945151. The next prime is 19945171. The reversal of 19945153 is 35154991.

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., 14691889 + 5253264 = 3833^2 + 2292^2 .

It is a cyclic number.

It is not a de Polignac number, because 19945153 - 2¹ = 19945151 is a prime.

Together with 19945151, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19945151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9972576 + 9972577.

It is an arithmetic number, because the mean of its divisors is an integer number (9972577).

Almost surely, 2^19945153 is an apocalyptic number.

It is an amenable number.

19945153 is a deficient number, since it is larger than the sum of its proper divisors (1).

19945153 is an equidigital number, since it uses as much as digits as its factorization.

19945153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 37.

The square root of 19945153 is about 4465.9996641290. Note that the first 3 decimals coincide. The cubic root of 19945153 is about 271.1934050557.

The spelling of 19945153 in words is "nineteen million, nine hundred forty-five thousand, one hundred fifty-three".