21066411476 has 24 divisors (see below), whose sum is σ = 40222707840. Its totient is φ = 9574448000.

The previous prime is 21066411473. The next prime is 21066411497. The reversal of 21066411476 is 67411466012.

It is a super-2 number, since 2×21066411476² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21066411473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395180 + ... + 445308.

It is an arithmetic number, because the mean of its divisors is an integer number (1675946160).

Almost surely, 2^21066411476 is an apocalyptic number.

It is an amenable number.

21066411476 is a deficient number, since it is larger than the sum of its proper divisors (19156296364).

21066411476 is a wasteful number, since it uses less digits than its factorization.

21066411476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59695 (or 59693 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

Adding to 21066411476 its reverse (67411466012), we get a palindrome (88477877488).

The spelling of 21066411476 in words is "twenty-one billion, sixty-six million, four hundred eleven thousand, four hundred seventy-six".