20423113427 has 2 divisors, whose sum is σ = 20423113428. Its totient is φ = 20423113426.

The previous prime is 20423113411. The next prime is 20423113429. The reversal of 20423113427 is 72431132402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20423113427 - 2⁴ = 20423113411 is a prime.

Together with 20423113429, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20423113427.

It is not a weakly prime, because it can be changed into another prime (20423113429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211556713 + 10211556714.

It is an arithmetic number, because the mean of its divisors is an integer number (10211556714).

Almost surely, 2^20423113427 is an apocalyptic number.

20423113427 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423113427 is an equidigital number, since it uses as much as digits as its factorization.

20423113427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

Adding to 20423113427 its reverse (72431132402), we get a palindrome (92854245829).

The spelling of 20423113427 in words is "twenty billion, four hundred twenty-three million, one hundred thirteen thousand, four hundred twenty-seven".