20646002407 has 8 divisors (see below), whose sum is σ = 20681296256. Its totient is φ = 20610731232.

The previous prime is 20646002401. The next prime is 20646002431. The reversal of 20646002407 is 70420064602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20646002407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20646002401) 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, 3363313 + ... + 3369445.

It is an arithmetic number, because the mean of its divisors is an integer number (2585162032).

Almost surely, 2^20646002407 is an apocalyptic number.

20646002407 is a deficient number, since it is larger than the sum of its proper divisors (35293849).

20646002407 is an equidigital number, since it uses as much as digits as its factorization.

20646002407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11337.

The product of its (nonzero) digits is 16128, while the sum is 31.

The spelling of 20646002407 in words is "twenty billion, six hundred forty-six million, two thousand, four hundred seven".