20754926417 has 4 divisors (see below), whose sum is σ = 20757717156. Its totient is φ = 20752135680.

The previous prime is 20754926383. The next prime is 20754926419. The reversal of 20754926417 is 71462945702.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1908029761 + 18846896656 = 43681^2 + 137284^2 .

It is a cyclic number.

It is not a de Polignac number, because 20754926417 - 2²² = 20750732113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20754926419) 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, 1384184 + ... + 1399097.

It is an arithmetic number, because the mean of its divisors is an integer number (5189429289).

Almost surely, 2^20754926417 is an apocalyptic number.

It is an amenable number.

20754926417 is a deficient number, since it is larger than the sum of its proper divisors (2790739).

20754926417 is an equidigital number, since it uses as much as digits as its factorization.

20754926417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790738.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 20754926417 in words is "twenty billion, seven hundred fifty-four million, nine hundred twenty-six thousand, four hundred seventeen".