20878102317 has 8 divisors (see below), whose sum is σ = 29047794624. Its totient is φ = 13313572448.

The previous prime is 20878102303. The next prime is 20878102331. The reversal of 20878102317 is 71320187802.

It is an interprime number because it is at equal distance from previous prime (20878102303) and next prime (20878102331).

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

It is not a de Polignac number, because 20878102317 - 2¹² = 20878098221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20878102417) 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, 151290528 + ... + 151290665.

It is an arithmetic number, because the mean of its divisors is an integer number (3630974328).

Almost surely, 2^20878102317 is an apocalyptic number.

It is an amenable number.

20878102317 is a deficient number, since it is larger than the sum of its proper divisors (8169692307).

20878102317 is a wasteful number, since it uses less digits than its factorization.

20878102317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302581219.

The product of its (nonzero) digits is 37632, while the sum is 39.

The spelling of 20878102317 in words is "twenty billion, eight hundred seventy-eight million, one hundred two thousand, three hundred seventeen".