20102002011 has 48 divisors (see below), whose sum is σ = 37307776800. Its totient is φ = 10603244736.

The previous prime is 20102002003. The next prime is 20102002079. The reversal of 20102002011 is 11020020102.

It is not a de Polignac number, because 20102002011 - 2³ = 20102002003 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 = 20102001984 and 20102002002.

It is not an unprimeable number, because it can be changed into a prime (20102002211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 567196 + ... + 601593.

It is an arithmetic number, because the mean of its divisors is an integer number (777245350).

Almost surely, 2^20102002011 is an apocalyptic number.

20102002011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20102002011 is a deficient number, since it is larger than the sum of its proper divisors (17205774789).

20102002011 is a wasteful number, since it uses less digits than its factorization.

20102002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168825 (or 1168812 counting only the distinct ones).

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

Adding to 20102002011 its reverse (11020020102), we get a palindrome (31122022113).

The spelling of 20102002011 in words is "twenty billion, one hundred two million, two thousand, eleven".