20174620317 has 4 divisors (see below), whose sum is σ = 26899493760. Its totient is φ = 13449746876.

The previous prime is 20174620309. The next prime is 20174620321. The reversal of 20174620317 is 71302647102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20174620317 - 2³ = 20174620309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20174620217) 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, 3362436717 + ... + 3362436722.

It is an arithmetic number, because the mean of its divisors is an integer number (6724873440).

Almost surely, 2^20174620317 is an apocalyptic number.

It is an amenable number.

20174620317 is a deficient number, since it is larger than the sum of its proper divisors (6724873443).

20174620317 is an equidigital number, since it uses as much as digits as its factorization.

20174620317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6724873442.

The product of its (nonzero) digits is 14112, while the sum is 33.

The spelling of 20174620317 in words is "twenty billion, one hundred seventy-four million, six hundred twenty thousand, three hundred seventeen".