21766010536 has 16 divisors (see below), whose sum is σ = 40970072340. Its totient is φ = 10840657920.

The previous prime is 21766010533. The next prime is 21766010569. The reversal of 21766010536 is 63501066712.

It can be written as a sum of positive squares in 2 ways, for example, as 17410802500 + 4355208036 = 131950^2 + 65994^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21766010495 and 21766010504.

It is not an unprimeable number, because it can be changed into a prime (21766010533) 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 3 ways as a sum of consecutive naturals, for example, 5291235 + ... + 5295346.

Almost surely, 2^21766010536 is an apocalyptic number.

It is an amenable number.

21766010536 is a deficient number, since it is larger than the sum of its proper divisors (19204061804).

21766010536 is a wasteful number, since it uses less digits than its factorization.

21766010536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10586844 (or 10586840 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 21766010536 in words is "twenty-one billion, seven hundred sixty-six million, ten thousand, five hundred thirty-six".