20067616417 has 4 divisors (see below), whose sum is σ = 20759603220. Its totient is φ = 19375629616.

The previous prime is 20067616411. The next prime is 20067616433. The reversal of 20067616417 is 71461676002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71461676002 = 2 ⋅35730838001.

It can be written as a sum of positive squares in 2 ways, for example, as 3396674961 + 16670941456 = 58281^2 + 129116^2 .

It is a cyclic number.

It is not a de Polignac number, because 20067616417 - 2²⁷ = 19933398689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20067616417.

It is not an unprimeable number, because it can be changed into a prime (20067616411) 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, 345993358 + ... + 345993415.

It is an arithmetic number, because the mean of its divisors is an integer number (5189900805).

Almost surely, 2^20067616417 is an apocalyptic number.

It is an amenable number.

20067616417 is a deficient number, since it is larger than the sum of its proper divisors (691986803).

20067616417 is an equidigital number, since it uses as much as digits as its factorization.

20067616417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691986802.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 20067616417 in words is "twenty billion, sixty-seven million, six hundred sixteen thousand, four hundred seventeen".