20500062066 has 80 divisors (see below), whose sum is σ = 50148188640. Its totient is φ = 6207563520.

The previous prime is 20500062059. The next prime is 20500062073. The reversal of 20500062066 is 66026000502.

It is an interprime number because it is at equal distance from previous prime (20500062059) and next prime (20500062073).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 3020665 + ... + 3027443.

It is an arithmetic number, because the mean of its divisors is an integer number (626852358).

Almost surely, 2^20500062066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20500062066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25074094320).

20500062066 is an abundant number, since it is smaller than the sum of its proper divisors (29648126574).

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

20500062066 is a wasteful number, since it uses less digits than its factorization.

20500062066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8501 (or 8492 counting only the distinct ones).

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

Adding to 20500062066 its reverse (66026000502), we get a palindrome (86526062568).

The spelling of 20500062066 in words is "twenty billion, five hundred million, sixty-two thousand, sixty-six".