20646323230 has 16 divisors (see below), whose sum is σ = 40022103744. Its totient is φ = 7623257760.

The previous prime is 20646323197. The next prime is 20646323233. The reversal of 20646323230 is 3232364602.

It is a junction number, because it is equal to n+sod(n) for n = 20646323192 and 20646323201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20646323233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79408806 + ... + 79409065.

It is an arithmetic number, because the mean of its divisors is an integer number (2501381484).

Almost surely, 2^20646323230 is an apocalyptic number.

20646323230 is a deficient number, since it is larger than the sum of its proper divisors (19375780514).

20646323230 is a wasteful number, since it uses less digits than its factorization.

20646323230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158817891.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 20646323230 its reverse (3232364602), we get a palindrome (23878687832).

The spelling of 20646323230 in words is "twenty billion, six hundred forty-six million, three hundred twenty-three thousand, two hundred thirty".