20404000489667 has 2 divisors, whose sum is σ = 20404000489668. Its totient is φ = 20404000489666.

The previous prime is 20404000489651. The next prime is 20404000489681. The reversal of 20404000489667 is 76698400040402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20404000489667 - 2⁴ = 20404000489651 is a prime.

It is not a weakly prime, because it can be changed into another prime (20404000489637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202000244833 + 10202000244834.

It is an arithmetic number, because the mean of its divisors is an integer number (10202000244834).

Almost surely, 2^{20404000489667} is an apocalyptic number.

20404000489667 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404000489667 is an equidigital number, since it uses as much as digits as its factorization.

20404000489667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 50.

The spelling of 20404000489667 in words is "twenty trillion, four hundred four billion, four hundred eighty-nine thousand, six hundred sixty-seven".