20447660650 has 24 divisors (see below), whose sum is σ = 38036901420. Its totient is φ = 8178149760.

The previous prime is 20447660641. The next prime is 20447660683. The reversal of 20447660650 is 5606674402.

It can be written as a sum of positive squares in 6 ways, for example, as 10737726129 + 9709934521 = 103623^2 + 98539^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 593086 + ... + 626614.

Almost surely, 2^20447660650 is an apocalyptic number.

20447660650 is a deficient number, since it is larger than the sum of its proper divisors (17589240770).

20447660650 is a wasteful number, since it uses less digits than its factorization.

20447660650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45738 (or 45733 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 20447660650 in words is "twenty billion, four hundred forty-seven million, six hundred sixty thousand, six hundred fifty".