20153213 has 2 divisors, whose sum is σ = 20153214. Its totient is φ = 20153212.

The previous prime is 20153209. The next prime is 20153219. The reversal of 20153213 is 31235102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16630084 + 3523129 = 4078^2 + 1877^2 .

It is a cyclic number.

It is not a de Polignac number, because 20153213 - 2² = 20153209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20153191 and 20153200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20153219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10076606 + 10076607.

It is an arithmetic number, because the mean of its divisors is an integer number (10076607).

Almost surely, 2^20153213 is an apocalyptic number.

It is an amenable number.

20153213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20153213 is an equidigital number, since it uses as much as digits as its factorization.

20153213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 20153213 is about 4489.2330079870. The cubic root of 20153213 is about 272.1331392966.

Adding to 20153213 its reverse (31235102), we get a palindrome (51388315).

The spelling of 20153213 in words is "twenty million, one hundred fifty-three thousand, two hundred thirteen".