20162489 has 2 divisors, whose sum is σ = 20162490. Its totient is φ = 20162488.

The previous prime is 20162449. The next prime is 20162501. The reversal of 20162489 is 98426102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11560000 + 8602489 = 3400^2 + 2933^2 .

It is a cyclic number.

It is not a de Polignac number, because 20162489 - 2²⁴ = 3385273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20162449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10081244 + 10081245.

It is an arithmetic number, because the mean of its divisors is an integer number (10081245).

Almost surely, 2^20162489 is an apocalyptic number.

It is an amenable number.

20162489 is a deficient number, since it is larger than the sum of its proper divisors (1).

20162489 is an equidigital number, since it uses as much as digits as its factorization.

20162489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 20162489 is about 4490.2660277538. The cubic root of 20162489 is about 272.1748848289.

The spelling of 20162489 in words is "twenty million, one hundred sixty-two thousand, four hundred eighty-nine".