19520147 has 2 divisors, whose sum is σ = 19520148. Its totient is φ = 19520146.

The previous prime is 19520113. The next prime is 19520153. The reversal of 19520147 is 74102591.

It is a strong prime.

It is an emirp because it is prime and its reverse (74102591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19520147 - 2⁸ = 19519891 is a prime.

It is a super-2 number, since 2×19520147² = 762072277803218, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19520107) 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, 9760073 + 9760074.

It is an arithmetic number, because the mean of its divisors is an integer number (9760074).

Almost surely, 2^19520147 is an apocalyptic number.

19520147 is a deficient number, since it is larger than the sum of its proper divisors (1).

19520147 is an equidigital number, since it uses as much as digits as its factorization.

19520147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 19520147 is about 4418.1610427869. The cubic root of 19520147 is about 269.2532957792.

The spelling of 19520147 in words is "nineteen million, five hundred twenty thousand, one hundred forty-seven".