20351644102066 has 32 divisors (see below), whose sum is σ = 31325773824000. Its totient is φ = 9913024032912.

The previous prime is 20351644102061. The next prime is 20351644102183. The reversal of 20351644102066 is 66020144615302.

It is not an unprimeable number, because it can be changed into a prime (20351644102061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12082495 + ... + 13663453.

It is an arithmetic number, because the mean of its divisors is an integer number (978930432000).

Almost surely, 2^{20351644102066} is an apocalyptic number.

20351644102066 is a deficient number, since it is larger than the sum of its proper divisors (10974129721934).

20351644102066 is a wasteful number, since it uses less digits than its factorization.

20351644102066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582006.

The product of its (nonzero) digits is 207360, while the sum is 40.

Adding to 20351644102066 its reverse (66020144615302), we get a palindrome (86371788717368).

The spelling of 20351644102066 in words is "twenty trillion, three hundred fifty-one billion, six hundred forty-four million, one hundred two thousand, sixty-six".