20413635066 has 80 divisors (see below), whose sum is σ = 50179551840. Its totient is φ = 6151295520.

The previous prime is 20413635049. The next prime is 20413635127. The reversal of 20413635066 is 66053631402.

20413635066 is a `hidden beast` number, since 2 + 0 + 4 + 13 + 635 + 0 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20413635066.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 286980 + ... + 350976.

It is an arithmetic number, because the mean of its divisors is an integer number (627244398).

Almost surely, 2^20413635066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20413635066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25089775920).

20413635066 is an abundant number, since it is smaller than the sum of its proper divisors (29765916774).

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

20413635066 is a wasteful number, since it uses less digits than its factorization.

20413635066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64201 (or 64192 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 20413635066 in words is "twenty billion, four hundred thirteen million, six hundred thirty-five thousand, sixty-six".