20100018283021 has 4 divisors (see below), whose sum is σ = 20100229719232. Its totient is φ = 20099806846812.

The previous prime is 20100018282961. The next prime is 20100018283057. The reversal of 20100018283021 is 12038281000102.

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 20100018283021 - 2²⁷ = 20099884065293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100018286021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105575445 + ... + 105765658.

It is an arithmetic number, because the mean of its divisors is an integer number (5025057429808).

Almost surely, 2^{20100018283021} is an apocalyptic number.

It is an amenable number.

20100018283021 is a deficient number, since it is larger than the sum of its proper divisors (211436211).

20100018283021 is an equidigital number, since it uses as much as digits as its factorization.

20100018283021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211436210.

The product of its (nonzero) digits is 1536, while the sum is 28.

Adding to 20100018283021 its reverse (12038281000102), we get a palindrome (32138299283123).

The spelling of 20100018283021 in words is "twenty trillion, one hundred billion, eighteen million, two hundred eighty-three thousand, twenty-one".