20664131036 has 48 divisors (see below), whose sum is σ = 40048044960. Its totient is φ = 9291386880.

The previous prime is 20664131021. The next prime is 20664131051. The reversal of 20664131036 is 63013146602.

It is an interprime number because it is at equal distance from previous prime (20664131021) and next prime (20664131051).

It is a super-2 number, since 2×20664131036² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20664130993 and 20664131011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25676 + ... + 204908.

It is an arithmetic number, because the mean of its divisors is an integer number (834334270).

Almost surely, 2^20664131036 is an apocalyptic number.

It is an amenable number.

20664131036 is a deficient number, since it is larger than the sum of its proper divisors (19383913924).

20664131036 is a wasteful number, since it uses less digits than its factorization.

20664131036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179334 (or 179332 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 20664131036 its reverse (63013146602), we get a palindrome (83677277638).

The spelling of 20664131036 in words is "twenty billion, six hundred sixty-four million, one hundred thirty-one thousand, thirty-six".