20646002406 has 8 divisors (see below), whose sum is σ = 41292004824. Its totient is φ = 6882000800.

The previous prime is 20646002401. The next prime is 20646002431. The reversal of 20646002406 is 60420064602.

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

20646002406 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 1720500195 + ... + 1720500206.

It is an arithmetic number, because the mean of its divisors is an integer number (5161500603).

Almost surely, 2^20646002406 is an apocalyptic number.

20646002406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20646002406 is a wasteful number, since it uses less digits than its factorization.

20646002406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441000406.

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 20646002406 in words is "twenty billion, six hundred forty-six million, two thousand, four hundred six".