21843064970 has 16 divisors (see below), whose sum is σ = 39706801128. Its totient is φ = 8650718400.

The previous prime is 21843064951. The next prime is 21843064979. The reversal of 21843064970 is 7946034812.

It can be written as a sum of positive squares in 4 ways, for example, as 16847261209 + 4995803761 = 129797^2 + 70681^2 .

It is a super-2 number, since 2×21843064970² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21843064979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10812389 + ... + 10814408.

Almost surely, 2^21843064970 is an apocalyptic number.

21843064970 is a deficient number, since it is larger than the sum of its proper divisors (17863736158).

21843064970 is a wasteful number, since it uses less digits than its factorization.

21843064970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21626905.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 21843064970 in words is "twenty-one billion, eight hundred forty-three million, sixty-four thousand, nine hundred seventy".