21466602436 has 6 divisors (see below), whose sum is σ = 37566554270. Its totient is φ = 10733301216.

The previous prime is 21466602433. The next prime is 21466602503. The reversal of 21466602436 is 63420666412.

It can be written as a sum of positive squares in only one way, i.e., 20195252100 + 1271350336 = 142110^2 + 35656^2 .

It is a super-2 number, since 2×21466602436² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21466602433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2683325301 + ... + 2683325308.

Almost surely, 2^21466602436 is an apocalyptic number.

It is an amenable number.

21466602436 is a deficient number, since it is larger than the sum of its proper divisors (16099951834).

21466602436 is a wasteful number, since it uses less digits than its factorization.

21466602436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5366650613 (or 5366650611 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 21466602436 in words is "twenty-one billion, four hundred sixty-six million, six hundred two thousand, four hundred thirty-six".