20435065617 has 16 divisors (see below), whose sum is σ = 27431823488. Its totient is φ = 13531069440.

The previous prime is 20435065603. The next prime is 20435065621. The reversal of 20435065617 is 71656053402.

It is not a de Polignac number, because 20435065617 - 2²³ = 20426677009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20435063617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337383 + ... + 393315.

It is an arithmetic number, because the mean of its divisors is an integer number (1714488968).

Almost surely, 2^20435065617 is an apocalyptic number.

It is an amenable number.

20435065617 is a deficient number, since it is larger than the sum of its proper divisors (6996757871).

20435065617 is a wasteful number, since it uses less digits than its factorization.

20435065617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56760.

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 20435065617 in words is "twenty billion, four hundred thirty-five million, sixty-five thousand, six hundred seventeen".