20620010640636 has 144 divisors (see below), whose sum is σ = 58271051494656. Its totient is φ = 6093684000000.

The previous prime is 20620010640631. The next prime is 20620010640637. The reversal of 20620010640636 is 63604601002602.

20620010640636 is a `hidden beast` number, since 2 + 0 + 6 + 2 + 0 + 0 + 1 + 0 + 640 + 6 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20620010640636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620010640631) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41169111 + ... + 41666961.

It is an arithmetic number, because the mean of its divisors is an integer number (404660079824).

Almost surely, 2^{20620010640636} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20620010640636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29135525747328).

20620010640636 is an abundant number, since it is smaller than the sum of its proper divisors (37651040854020).

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

20620010640636 is a wasteful number, since it uses less digits than its factorization.

20620010640636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500464 (or 500459 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 20620010640636 in words is "twenty trillion, six hundred twenty billion, ten million, six hundred forty thousand, six hundred thirty-six".