20417066855 has 8 divisors (see below), whose sum is σ = 24502111200. Its totient is φ = 16332566176.

The previous prime is 20417066851. The next prime is 20417066893. The reversal of 20417066855 is 55866071402.

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

It is a cyclic number.

It is not a de Polignac number, because 20417066855 - 2² = 20417066851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20417066851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48140 + ... + 207729.

It is an arithmetic number, because the mean of its divisors is an integer number (3062763900).

Almost surely, 2^20417066855 is an apocalyptic number.

20417066855 is a deficient number, since it is larger than the sum of its proper divisors (4085044345).

20417066855 is a wasteful number, since it uses less digits than its factorization.

20417066855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271833.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 20417066855 in words is "twenty billion, four hundred seventeen million, sixty-six thousand, eight hundred fifty-five".