20010213 has 8 divisors (see below), whose sum is σ = 29644800. Its totient is φ = 13340124.

The previous prime is 20010209. The next prime is 20010217. The reversal of 20010213 is 31201002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20010209) and next prime (20010217).

It is not a de Polignac number, because 20010213 - 2² = 20010209 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 = 20010195 and 20010204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370533 + ... + 370586.

It is an arithmetic number, because the mean of its divisors is an integer number (3705600).

Almost surely, 2^20010213 is an apocalyptic number.

It is an amenable number.

20010213 is a deficient number, since it is larger than the sum of its proper divisors (9634587).

20010213 is an equidigital number, since it uses as much as digits as its factorization.

20010213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741128 (or 741122 counting only the distinct ones).

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

The square root of 20010213 is about 4473.2776573783. The cubic root of 20010213 is about 271.4879577089.

Adding to 20010213 its reverse (31201002), we get a palindrome (51211215).

The spelling of 20010213 in words is "twenty million, ten thousand, two hundred thirteen".