21471464317643 has 4 divisors (see below), whose sum is σ = 21477225379680. Its totient is φ = 21465703255608.

The previous prime is 21471464317579. The next prime is 21471464317649. The reversal of 21471464317643 is 34671346417412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21471464317643 - 2⁶ = 21471464317579 is a prime.

It is a super-2 number, since 2×21471464317643² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21471464317649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2880525428 + ... + 2880532881.

It is an arithmetic number, because the mean of its divisors is an integer number (5369306344920).

Almost surely, 2^{21471464317643} is an apocalyptic number.

21471464317643 is a deficient number, since it is larger than the sum of its proper divisors (5761062037).

21471464317643 is an equidigital number, since it uses as much as digits as its factorization.

21471464317643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5761062036.

The product of its digits is 8128512, while the sum is 53.

The spelling of 21471464317643 in words is "twenty-one trillion, four hundred seventy-one billion, four hundred sixty-four million, three hundred seventeen thousand, six hundred forty-three".