20417767311 has 4 divisors (see below), whose sum is σ = 27223689752. Its totient is φ = 13611844872.

The previous prime is 20417767291. The next prime is 20417767319. The reversal of 20417767311 is 11376771402.

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

It is not a de Polignac number, because 20417767311 - 2⁶ = 20417767247 is a prime.

It is a super-2 number, since 2×20417767311² (a number of 21 digits) contains 22 as substring.

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 20417767311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20417767319) 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, 3402961216 + ... + 3402961221.

It is an arithmetic number, because the mean of its divisors is an integer number (6805922438).

Almost surely, 2^20417767311 is an apocalyptic number.

20417767311 is a deficient number, since it is larger than the sum of its proper divisors (6805922441).

20417767311 is an equidigital number, since it uses as much as digits as its factorization.

20417767311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6805922440.

The product of its (nonzero) digits is 49392, while the sum is 39.

The spelling of 20417767311 in words is "twenty billion, four hundred seventeen million, seven hundred sixty-seven thousand, three hundred eleven".