20025450017 has 2 divisors, whose sum is σ = 20025450018. Its totient is φ = 20025450016.

The previous prime is 20025449993. The next prime is 20025450059. The reversal of 20025450017 is 71005452002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15825891601 + 4199558416 = 125801^2 + 64804^2 .

It is a cyclic number.

It is not a de Polignac number, because 20025450017 - 2²² = 20021255713 is a prime.

It is not a weakly prime, because it can be changed into another prime (20025450077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10012725008 + 10012725009.

It is an arithmetic number, because the mean of its divisors is an integer number (10012725009).

Almost surely, 2^20025450017 is an apocalyptic number.

It is an amenable number.

20025450017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20025450017 is an equidigital number, since it uses as much as digits as its factorization.

20025450017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 26.

The spelling of 20025450017 in words is "twenty billion, twenty-five million, four hundred fifty thousand, seventeen".