20102640324773 has 4 divisors (see below), whose sum is σ = 20179076219808. Its totient is φ = 20026204429740.

The previous prime is 20102640324763. The next prime is 20102640324829. The reversal of 20102640324773 is 37742304620102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20102640324773 - 2¹⁸ = 20102640062629 is a prime.

It is a super-2 number, since 2×20102640324773² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20102640324773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102640324763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38217947123 + ... + 38217947648.

It is an arithmetic number, because the mean of its divisors is an integer number (5044769054952).

Almost surely, 2^{20102640324773} is an apocalyptic number.

It is an amenable number.

20102640324773 is a deficient number, since it is larger than the sum of its proper divisors (76435895035).

20102640324773 is an equidigital number, since it uses as much as digits as its factorization.

20102640324773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76435895034.

The product of its (nonzero) digits is 338688, while the sum is 41.

Adding to 20102640324773 its reverse (37742304620102), we get a palindrome (57844944944875).

The spelling of 20102640324773 in words is "twenty trillion, one hundred two billion, six hundred forty million, three hundred twenty-four thousand, seven hundred seventy-three".