21771070730 has 16 divisors (see below), whose sum is σ = 39373655904. Its totient is φ = 8667155280.

The previous prime is 21771070703. The next prime is 21771070777. The reversal of 21771070730 is 3707017712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5156912 + ... + 5161131.

It is an arithmetic number, because the mean of its divisors is an integer number (2460853494).

Almost surely, 2^21771070730 is an apocalyptic number.

21771070730 is a deficient number, since it is larger than the sum of its proper divisors (17602585174).

21771070730 is a wasteful number, since it uses less digits than its factorization.

21771070730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10318261.

The product of its (nonzero) digits is 14406, while the sum is 35.

The spelling of 21771070730 in words is "twenty-one billion, seven hundred seventy-one million, seventy thousand, seven hundred thirty".