20646122000 has 160 divisors (see below), whose sum is σ = 60057703680. Its totient is φ = 6706022400.

The previous prime is 20646121957. The next prime is 20646122053. The reversal of 20646122000 is 22164602.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227192 + ... + 304808.

It is an arithmetic number, because the mean of its divisors is an integer number (375360648).

Almost surely, 2^20646122000 is an apocalyptic number.

20646122000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20646122000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30028851840).

20646122000 is an abundant number, since it is smaller than the sum of its proper divisors (39411581680).

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

20646122000 is a wasteful number, since it uses less digits than its factorization.

20646122000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77666 (or 77650 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20646122000 its reverse (22164602), we get a palindrome (20668286602).

The spelling of 20646122000 in words is "twenty billion, six hundred forty-six million, one hundred twenty-two thousand".