20296747665 has 64 divisors (see below), whose sum is σ = 37011686400. Its totient is φ = 10548375552.

The previous prime is 20296747649. The next prime is 20296747733. The reversal of 20296747665 is 56674769202.

20296747665 is a `hidden beast` number, since 20 + 2 + 96 + 7 + 476 + 65 = 666.

It is not a de Polignac number, because 20296747665 - 2⁴ = 20296747649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1471521 + ... + 1485249.

It is an arithmetic number, because the mean of its divisors is an integer number (578307600).

Almost surely, 2^20296747665 is an apocalyptic number.

It is an amenable number.

20296747665 is a deficient number, since it is larger than the sum of its proper divisors (16714938735).

20296747665 is a wasteful number, since it uses less digits than its factorization.

20296747665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14023 (or 14017 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 20296747665 in words is "twenty billion, two hundred ninety-six million, seven hundred forty-seven thousand, six hundred sixty-five".