20357854771 has 2 divisors, whose sum is σ = 20357854772. Its totient is φ = 20357854770.

The previous prime is 20357854747. The next prime is 20357854799. The reversal of 20357854771 is 17745875302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20357854771 - 2⁹ = 20357854259 is a prime.

It is not a weakly prime, because it can be changed into another prime (20357851771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10178927385 + 10178927386.

It is an arithmetic number, because the mean of its divisors is an integer number (10178927386).

Almost surely, 2^20357854771 is an apocalyptic number.

20357854771 is a deficient number, since it is larger than the sum of its proper divisors (1).

20357854771 is an equidigital number, since it uses as much as digits as its factorization.

20357854771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1646400, while the sum is 49.

The spelling of 20357854771 in words is "twenty billion, three hundred fifty-seven million, eight hundred fifty-four thousand, seven hundred seventy-one".