20020102011 has 48 divisors (see below), whose sum is σ = 36459433920. Its totient is φ = 10302474240.

The previous prime is 20020101953. The next prime is 20020102019. The reversal of 20020102011 is 11020102002.

It is not a de Polignac number, because 20020102011 - 2¹⁰ = 20020100987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20020101984 and 20020102002.

It is not an unprimeable number, because it can be changed into a prime (20020102019) 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 47 ways as a sum of consecutive naturals, for example, 264526 + ... + 331683.

It is an arithmetic number, because the mean of its divisors is an integer number (759571540).

Almost surely, 2^20020102011 is an apocalyptic number.

20020102011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20020102011 is a deficient number, since it is larger than the sum of its proper divisors (16439331909).

20020102011 is a wasteful number, since it uses less digits than its factorization.

20020102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596276 (or 596273 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20020102011 its reverse (11020102002), we get a palindrome (31040204013).

Subtracting from 20020102011 its reverse (11020102002), we obtain a palindrome (9000000009).

The spelling of 20020102011 in words is "twenty billion, twenty million, one hundred two thousand, eleven".