20620213650 has 144 divisors (see below), whose sum is σ = 58531075200. Its totient is φ = 5195998080.

The previous prime is 20620213633. The next prime is 20620213651. The reversal of 20620213650 is 5631202602.

20620213650 is a `hidden beast` number, since 2 + 0 + 6 + 2 + 0 + 2 + 1 + 3 + 650 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20620213651) 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 71 ways as a sum of consecutive naturals, for example, 596541 + ... + 630159.

It is an arithmetic number, because the mean of its divisors is an integer number (406465800).

Almost surely, 2^20620213650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20620213650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29265537600).

20620213650 is an abundant number, since it is smaller than the sum of its proper divisors (37910861550).

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

20620213650 is a wasteful number, since it uses less digits than its factorization.

20620213650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33713 (or 33705 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

It can be divided in two parts, 20620 and 213650, that added together give a triangular number (234270 = T₆₈₄).

The spelling of 20620213650 in words is "twenty billion, six hundred twenty million, two hundred thirteen thousand, six hundred fifty".