20123003489 has 2 divisors, whose sum is σ = 20123003490. Its totient is φ = 20123003488.

The previous prime is 20123003443. The next prime is 20123003497. The reversal of 20123003489 is 98430032102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19928121889 + 194881600 = 141167^2 + 13960^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123003489 - 2¹⁶ = 20122937953 is a prime.

It is not a weakly prime, because it can be changed into another prime (20123003689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061501744 + 10061501745.

It is an arithmetic number, because the mean of its divisors is an integer number (10061501745).

Almost surely, 2^20123003489 is an apocalyptic number.

It is an amenable number.

20123003489 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123003489 is an equidigital number, since it uses as much as digits as its factorization.

20123003489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 20123003489 in words is "twenty billion, one hundred twenty-three million, three thousand, four hundred eighty-nine".