21160634471 has 2 divisors, whose sum is σ = 21160634472. Its totient is φ = 21160634470.

The previous prime is 21160634431. The next prime is 21160634483. The reversal of 21160634471 is 17443606112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21160634471 - 2¹⁸ = 21160372327 is a prime.

It is a super-3 number, since 3×21160634471³ (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 (21160634401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10580317235 + 10580317236.

It is an arithmetic number, because the mean of its divisors is an integer number (10580317236).

Almost surely, 2^21160634471 is an apocalyptic number.

21160634471 is a deficient number, since it is larger than the sum of its proper divisors (1).

21160634471 is an equidigital number, since it uses as much as digits as its factorization.

21160634471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 21160634471 in words is "twenty-one billion, one hundred sixty million, six hundred thirty-four thousand, four hundred seventy-one".