20400717395 has 4 divisors (see below), whose sum is σ = 24480860880. Its totient is φ = 16320573912.

The previous prime is 20400717371. The next prime is 20400717433. The reversal of 20400717395 is 59371700402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20400717395 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2040071735 + ... + 2040071744.

It is an arithmetic number, because the mean of its divisors is an integer number (6120215220).

Almost surely, 2^20400717395 is an apocalyptic number.

20400717395 is a deficient number, since it is larger than the sum of its proper divisors (4080143485).

20400717395 is an equidigital number, since it uses as much as digits as its factorization.

20400717395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4080143484.

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 20400717395 in words is "twenty billion, four hundred million, seven hundred seventeen thousand, three hundred ninety-five".