20026606664 has 8 divisors (see below), whose sum is σ = 37549887510. Its totient is φ = 10013303328.

The previous prime is 20026606657. The next prime is 20026606681. The reversal of 20026606664 is 46660662002.

It can be written as a sum of positive squares in only one way, i.e., 20010365764 + 16240900 = 141458^2 + 4030^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1251662909 + ... + 1251662924.

Almost surely, 2^20026606664 is an apocalyptic number.

It is an amenable number.

20026606664 is a deficient number, since it is larger than the sum of its proper divisors (17523280846).

20026606664 is a wasteful number, since it uses less digits than its factorization.

20026606664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503325839 (or 2503325835 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 20026606664 in words is "twenty billion, twenty-six million, six hundred six thousand, six hundred sixty-four".