20010100489 has 2 divisors, whose sum is σ = 20010100490. Its totient is φ = 20010100488.

The previous prime is 20010100403. The next prime is 20010100501. The reversal of 20010100489 is 98400101002.

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., 18873264400 + 1136836089 = 137380^2 + 33717^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010100489 - 2¹¹ = 20010098441 is a prime.

It is not a weakly prime, because it can be changed into another prime (20010100289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005050244 + 10005050245.

It is an arithmetic number, because the mean of its divisors is an integer number (10005050245).

Almost surely, 2^20010100489 is an apocalyptic number.

It is an amenable number.

20010100489 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010100489 is an equidigital number, since it uses as much as digits as its factorization.

20010100489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 20010100489 in words is "twenty billion, ten million, one hundred thousand, four hundred eighty-nine".