20102497 has 2 divisors, whose sum is σ = 20102498. Its totient is φ = 20102496.

The previous prime is 20102491. The next prime is 20102503. The reversal of 20102497 is 79420102.

It is a balanced prime because it is at equal distance from previous prime (20102491) and next prime (20102503).

It can be written as a sum of positive squares in only one way, i.e., 19395216 + 707281 = 4404^2 + 841^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102497 - 2¹⁵ = 20069729 is a prime.

It is a super-2 number, since 2×20102497² = 808220771270018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20102491) 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, 10051248 + 10051249.

It is an arithmetic number, because the mean of its divisors is an integer number (10051249).

Almost surely, 2^20102497 is an apocalyptic number.

It is an amenable number.

20102497 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102497 is an equidigital number, since it uses as much as digits as its factorization.

20102497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20102497 is about 4483.5808234044. The cubic root of 20102497 is about 271.9046712145.

Adding to 20102497 its reverse (79420102), we get a palindrome (99522599).

The spelling of 20102497 in words is "twenty million, one hundred two thousand, four hundred ninety-seven".