20002113 has 16 divisors (see below), whose sum is σ = 30077760. Its totient is φ = 13134528.

The previous prime is 20002097. The next prime is 20002123. The reversal of 20002113 is 31120002.

It is a happy number.

It is not a de Polignac number, because 20002113 - 2⁴ = 20002097 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 = 20002095 and 20002104.

It is not an unprimeable number, because it can be changed into a prime (20002123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3720 + ... + 7337.

It is an arithmetic number, because the mean of its divisors is an integer number (1879860).

Almost surely, 2^20002113 is an apocalyptic number.

It is an amenable number.

20002113 is a deficient number, since it is larger than the sum of its proper divisors (10075647).

20002113 is a wasteful number, since it uses less digits than its factorization.

20002113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11133 (or 11127 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20002113 is about 4472.3721893420. The cubic root of 20002113 is about 271.4513205969.

Adding to 20002113 its reverse (31120002), we get a palindrome (51122115).

The spelling of 20002113 in words is "twenty million, two thousand, one hundred thirteen".