20945104688 has 10 divisors (see below), whose sum is σ = 40581140364. Its totient is φ = 10472552336.

The previous prime is 20945104667. The next prime is 20945104703. The reversal of 20945104688 is 88640154902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654534506 + ... + 654534537.

Almost surely, 2^20945104688 is an apocalyptic number.

It is an amenable number.

20945104688 is a deficient number, since it is larger than the sum of its proper divisors (19636035676).

20945104688 is a wasteful number, since it uses less digits than its factorization.

20945104688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309069051 (or 1309069045 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 20945104688 in words is "twenty billion, nine hundred forty-five million, one hundred four thousand, six hundred eighty-eight".