17020420525999 has 4 divisors (see below), whose sum is σ = 18567731482920. Its totient is φ = 15473109569080.

The previous prime is 17020420525961. The next prime is 17020420526003. The reversal of 17020420525999 is 99952502402071.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 17020420525999 - 2²¹ = 17020418428847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17020420525949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773655478444 + ... + 773655478465.

It is an arithmetic number, because the mean of its divisors is an integer number (4641932870730).

Almost surely, 2^{17020420525999} is an apocalyptic number.

17020420525999 is a deficient number, since it is larger than the sum of its proper divisors (1547310956921).

17020420525999 is a wasteful number, since it uses less digits than its factorization.

17020420525999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547310956920.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 17020420525999 in words is "seventeen trillion, twenty billion, four hundred twenty million, five hundred twenty-five thousand, nine hundred ninety-nine".