20021266576 has 20 divisors (see below), whose sum is σ = 39087324144. Its totient is φ = 9934215200.

The previous prime is 20021266567. The next prime is 20021266627. The reversal of 20021266576 is 67566212002.

It is a super-2 number, since 2×20021266576² (a number of 21 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 4773970 + ... + 4778161.

Almost surely, 2^20021266576 is an apocalyptic number.

It is an amenable number.

20021266576 is a deficient number, since it is larger than the sum of its proper divisors (19066057568).

20021266576 is a wasteful number, since it uses less digits than its factorization.

20021266576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9552270 (or 9552264 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

Adding to 20021266576 its reverse (67566212002), we get a palindrome (87587478578).

The spelling of 20021266576 in words is "twenty billion, twenty-one million, two hundred sixty-six thousand, five hundred seventy-six".