21825877471 has 2 divisors, whose sum is σ = 21825877472. Its totient is φ = 21825877470.

The previous prime is 21825877433. The next prime is 21825877483. The reversal of 21825877471 is 17477852812.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21825877471 - 2³³ = 13235942879 is a prime.

It is a super-3 number, since 3×21825877471³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21825871471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10912938735 + 10912938736.

It is an arithmetic number, because the mean of its divisors is an integer number (10912938736).

Almost surely, 2^21825877471 is an apocalyptic number.

21825877471 is a deficient number, since it is larger than the sum of its proper divisors (1).

21825877471 is an equidigital number, since it uses as much as digits as its factorization.

21825877471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1756160, while the sum is 52.

The spelling of 21825877471 in words is "twenty-one billion, eight hundred twenty-five million, eight hundred seventy-seven thousand, four hundred seventy-one".