20029489 has 2 divisors, whose sum is σ = 20029490. Its totient is φ = 20029488.

The previous prime is 20029453. The next prime is 20029501. The reversal of 20029489 is 98492002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16160400 + 3869089 = 4020^2 + 1967^2 .

It is a cyclic number.

It is not a de Polignac number, because 20029489 - 2⁹ = 20028977 is a prime.

It is a super-2 number, since 2×20029489² = 802360859202242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20029189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10014744 + 10014745.

It is an arithmetic number, because the mean of its divisors is an integer number (10014745).

Almost surely, 2^20029489 is an apocalyptic number.

It is an amenable number.

20029489 is a deficient number, since it is larger than the sum of its proper divisors (1).

20029489 is an equidigital number, since it uses as much as digits as its factorization.

20029489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 20029489 is about 4475.4317110196. The cubic root of 20029489 is about 271.5751052466.

The spelling of 20029489 in words is "twenty million, twenty-nine thousand, four hundred eighty-nine".