20148497 has 2 divisors, whose sum is σ = 20148498. Its totient is φ = 20148496.

The previous prime is 20148487. The next prime is 20148503. The reversal of 20148497 is 79484102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18395521 + 1752976 = 4289^2 + 1324^2 .

It is a cyclic number.

It is not a de Polignac number, because 20148497 - 2⁶ = 20148433 is a prime.

It is not a weakly prime, because it can be changed into another prime (20148407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10074248 + 10074249.

It is an arithmetic number, because the mean of its divisors is an integer number (10074249).

Almost surely, 2^20148497 is an apocalyptic number.

It is an amenable number.

20148497 is a deficient number, since it is larger than the sum of its proper divisors (1).

20148497 is an equidigital number, since it uses as much as digits as its factorization.

20148497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 20148497 is about 4488.7077204915. The cubic root of 20148497 is about 272.1119105889. Note that the first 3 decimals are identical.

The spelling of 20148497 in words is "twenty million, one hundred forty-eight thousand, four hundred ninety-seven".