20666104226 has 8 divisors (see below), whose sum is σ = 31000645404. Its totient is φ = 10332555760.

The previous prime is 20666104223. The next prime is 20666104229. The reversal of 20666104226 is 62240166602.

It is an interprime number because it is at equal distance from previous prime (20666104223) and next prime (20666104229).

It can be written as a sum of positive squares in 2 ways, for example, as 16027813201 + 4638291025 = 126601^2 + 68105^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20666104223) 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, 193745 + ... + 280836.

Almost surely, 2^20666104226 is an apocalyptic number.

20666104226 is a deficient number, since it is larger than the sum of its proper divisors (10334541178).

20666104226 is a wasteful number, since it uses less digits than its factorization.

20666104226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496356.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 20666104226 in words is "twenty billion, six hundred sixty-six million, one hundred four thousand, two hundred twenty-six".