20315307427 has 4 divisors (see below), whose sum is σ = 20363562736. Its totient is φ = 20267052120.

The previous prime is 20315307421. The next prime is 20315307499. The reversal of 20315307427 is 72470351302.

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-20315307427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20315307392 and 20315307401.

It is not an unprimeable number, because it can be changed into a prime (20315307421) 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, 24127023 + ... + 24127864.

It is an arithmetic number, because the mean of its divisors is an integer number (5090890684).

Almost surely, 2^20315307427 is an apocalyptic number.

20315307427 is a deficient number, since it is larger than the sum of its proper divisors (48255309).

20315307427 is an equidigital number, since it uses as much as digits as its factorization.

20315307427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48255308.

The product of its (nonzero) digits is 35280, while the sum is 34.

Adding to 20315307427 its reverse (72470351302), we get a palindrome (92785658729).

The spelling of 20315307427 in words is "twenty billion, three hundred fifteen million, three hundred seven thousand, four hundred twenty-seven".