20706407650 has 24 divisors (see below), whose sum is σ = 38534228964. Its totient is φ = 8278195200.

The previous prime is 20706407629. The next prime is 20706407707. The reversal of 20706407650 is 5670460702.

It can be written as a sum of positive squares in 6 ways, for example, as 18133584921 + 2572822729 = 134661^2 + 50723^2 .

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, 12591 + ... + 203890.

Almost surely, 2^20706407650 is an apocalyptic number.

20706407650 is a deficient number, since it is larger than the sum of its proper divisors (17827821314).

20706407650 is a wasteful number, since it uses less digits than its factorization.

20706407650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218406 (or 218401 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 20706407650 in words is "twenty billion, seven hundred six million, four hundred seven thousand, six hundred fifty".