20454330427 has 2 divisors, whose sum is σ = 20454330428. Its totient is φ = 20454330426.

The previous prime is 20454330409. The next prime is 20454330461. The reversal of 20454330427 is 72403345402.

It is an a-pointer prime, because the next prime (20454330461) can be obtained adding 20454330427 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20454330427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20454330392 and 20454330401.

It is not a weakly prime, because it can be changed into another prime (20454330467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10227165213 + 10227165214.

It is an arithmetic number, because the mean of its divisors is an integer number (10227165214).

Almost surely, 2^20454330427 is an apocalyptic number.

20454330427 is a deficient number, since it is larger than the sum of its proper divisors (1).

20454330427 is an equidigital number, since it uses as much as digits as its factorization.

20454330427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 34.

Adding to 20454330427 its reverse (72403345402), we get a palindrome (92857675829).

The spelling of 20454330427 in words is "twenty billion, four hundred fifty-four million, three hundred thirty thousand, four hundred twenty-seven".