20644660200 has 48 divisors (see below), whose sum is σ = 63998448480. Its totient is φ = 5505242560.

The previous prime is 20644660151. The next prime is 20644660213. The reversal of 20644660200 is 206644602.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17203284 + ... + 17204483.

It is an arithmetic number, because the mean of its divisors is an integer number (1333301010).

Almost surely, 2^20644660200 is an apocalyptic number.

20644660200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20644660200 is an abundant number, since it is smaller than the sum of its proper divisors (43353788280).

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

20644660200 is a wasteful number, since it uses less digits than its factorization.

20644660200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34407786 (or 34407777 counting only the distinct ones).

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

The spelling of 20644660200 in words is "twenty billion, six hundred forty-four million, six hundred sixty thousand, two hundred".