19520113 has 2 divisors, whose sum is σ = 19520114. Its totient is φ = 19520112.

The previous prime is 19520107. The next prime is 19520147. The reversal of 19520113 is 31102591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18249984 + 1270129 = 4272^2 + 1127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19520113 is a prime.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (19520153) 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, 9760056 + 9760057.

It is an arithmetic number, because the mean of its divisors is an integer number (9760057).

Almost surely, 2^19520113 is an apocalyptic number.

It is an amenable number.

19520113 is a deficient number, since it is larger than the sum of its proper divisors (1).

19520113 is an equidigital number, since it uses as much as digits as its factorization.

19520113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 19520113 is about 4418.1571950305. The cubic root of 19520113 is about 269.2531394515.

The spelling of 19520113 in words is "nineteen million, five hundred twenty thousand, one hundred thirteen".