20646426396 has 48 divisors (see below), whose sum is σ = 49299264000. Its totient is φ = 6722123520.

The previous prime is 20646426389. The next prime is 20646426397. The reversal of 20646426396 is 69362464602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20646426397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244756 + ... + 318116.

It is an arithmetic number, because the mean of its divisors is an integer number (1027068000).

Almost surely, 2^20646426396 is an apocalyptic number.

It is an amenable number.

20646426396 is an abundant number, since it is smaller than the sum of its proper divisors (28652837604).

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

20646426396 is a wasteful number, since it uses less digits than its factorization.

20646426396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73914 (or 73912 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 48.

The spelling of 20646426396 in words is "twenty billion, six hundred forty-six million, four hundred twenty-six thousand, three hundred ninety-six".