20425481291 has 2 divisors, whose sum is σ = 20425481292. Its totient is φ = 20425481290.

The previous prime is 20425481281. The next prime is 20425481357. The reversal of 20425481291 is 19218452402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20425481291 - 2⁶ = 20425481227 is a prime.

It is not a weakly prime, because it can be changed into another prime (20425481201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212740645 + 10212740646.

It is an arithmetic number, because the mean of its divisors is an integer number (10212740646).

Almost surely, 2^20425481291 is an apocalyptic number.

20425481291 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425481291 is an equidigital number, since it uses as much as digits as its factorization.

20425481291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 20425481291 in words is "twenty billion, four hundred twenty-five million, four hundred eighty-one thousand, two hundred ninety-one".