20670652209 has 8 divisors (see below), whose sum is σ = 28233086112. Its totient is φ = 13444326560.

The previous prime is 20670652169. The next prime is 20670652213. The reversal of 20670652209 is 90225607602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20670652209 - 2⁷ = 20670652081 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20670652279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84026919 + ... + 84027164.

It is an arithmetic number, because the mean of its divisors is an integer number (3529135764).

Almost surely, 2^20670652209 is an apocalyptic number.

It is an amenable number.

20670652209 is a deficient number, since it is larger than the sum of its proper divisors (7562433903).

20670652209 is a wasteful number, since it uses less digits than its factorization.

20670652209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168054127.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 20670652209 in words is "twenty billion, six hundred seventy million, six hundred fifty-two thousand, two hundred nine".