20021102013 has 12 divisors (see below), whose sum is σ = 29342221664. Its totient is φ = 12134001000.

The previous prime is 20021101981. The next prime is 20021102027. The reversal of 20021102013 is 31020112002.

It is not a de Polignac number, because 20021102013 - 2⁵ = 20021101981 is a prime.

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 20021102013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021102513) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 27576913 + ... + 27577638.

Almost surely, 2^20021102013 is an apocalyptic number.

It is an amenable number.

20021102013 is a deficient number, since it is larger than the sum of its proper divisors (9321119651).

20021102013 is a wasteful number, since it uses less digits than its factorization.

20021102013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55154576 (or 55154565 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20021102013 its reverse (31020112002), we get a palindrome (51041214015).

The spelling of 20021102013 in words is "twenty billion, twenty-one million, one hundred two thousand, thirteen".