20670647697 has 96 divisors (see below), whose sum is σ = 36542105600. Its totient is φ = 11240208000.

The previous prime is 20670647677. The next prime is 20670647707. The reversal of 20670647697 is 79674607602.

It is a happy number.

20670647697 is a `hidden beast` number, since 20 + 67 + 0 + 6 + 476 + 97 = 666.

It is not a de Polignac number, because 20670647697 - 2¹² = 20670643601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20670647677) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5835747 + ... + 5839287.

Almost surely, 2^20670647697 is an apocalyptic number.

It is an amenable number.

20670647697 is a deficient number, since it is larger than the sum of its proper divisors (15871457903).

20670647697 is a wasteful number, since it uses less digits than its factorization.

20670647697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660 (or 3643 counting only the distinct ones).

The product of its (nonzero) digits is 5334336, while the sum is 54.

The spelling of 20670647697 in words is "twenty billion, six hundred seventy million, six hundred forty-seven thousand, six hundred ninety-seven".