20020002111 has 24 divisors (see below), whose sum is σ = 30705648480. Its totient is φ = 12525950976.

The previous prime is 20020002097. The next prime is 20020002113. The reversal of 20020002111 is 11120002002.

It is not a de Polignac number, because 20020002111 - 2¹⁹ = 20019477823 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 = 20020002093 and 20020002102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020002113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131331 + ... + 239348.

It is an arithmetic number, because the mean of its divisors is an integer number (1279402020).

Almost surely, 2^20020002111 is an apocalyptic number.

20020002111 is a deficient number, since it is larger than the sum of its proper divisors (10685646369).

20020002111 is a wasteful number, since it uses less digits than its factorization.

20020002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371055 (or 371052 counting only the distinct ones).

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

Adding to 20020002111 its reverse (11120002002), we get a palindrome (31140004113).

The spelling of 20020002111 in words is "twenty billion, twenty million, two thousand, one hundred eleven".