20626653512 has 8 divisors (see below), whose sum is σ = 38674975350. Its totient is φ = 10313326752.

The previous prime is 20626653511. The next prime is 20626653527. The reversal of 20626653512 is 21535662602.

It can be written as a sum of positive squares in only one way, i.e., 11173758436 + 9452895076 = 105706^2 + 97226^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (20626653511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289165837 + ... + 1289165852.

Almost surely, 2^20626653512 is an apocalyptic number.

It is an amenable number.

20626653512 is a deficient number, since it is larger than the sum of its proper divisors (18048321838).

20626653512 is a wasteful number, since it uses less digits than its factorization.

20626653512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578331695 (or 2578331691 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 20626653512 in words is "twenty billion, six hundred twenty-six million, six hundred fifty-three thousand, five hundred twelve".