20302213 has 4 divisors (see below), whose sum is σ = 20334240. Its totient is φ = 20270188.

The previous prime is 20302211. The next prime is 20302223. The reversal of 20302213 is 31220302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31220302 = 2 ⋅15610151.

It is a cyclic number.

It is not a de Polignac number, because 20302213 - 2¹ = 20302211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20302193 and 20302202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15043 + ... + 16336.

It is an arithmetic number, because the mean of its divisors is an integer number (5083560).

Almost surely, 2^20302213 is an apocalyptic number.

It is an amenable number.

20302213 is a deficient number, since it is larger than the sum of its proper divisors (32027).

20302213 is an equidigital number, since it uses as much as digits as its factorization.

20302213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32026.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20302213 is about 4505.7977096181. The cubic root of 20302213 is about 272.8021528498.

Adding to 20302213 its reverse (31220302), we get a palindrome (51522515).

The spelling of 20302213 in words is "twenty million, three hundred two thousand, two hundred thirteen".