20153207 has 2 divisors, whose sum is σ = 20153208. Its totient is φ = 20153206.

The previous prime is 20153201. The next prime is 20153209. The reversal of 20153207 is 70235102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20153207 - 2⁴ = 20153191 is a prime.

Together with 20153209, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20153201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10076603 + 10076604.

It is an arithmetic number, because the mean of its divisors is an integer number (10076604).

Almost surely, 2^20153207 is an apocalyptic number.

20153207 is a deficient number, since it is larger than the sum of its proper divisors (1).

20153207 is an equidigital number, since it uses as much as digits as its factorization.

20153207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20153207 is about 4489.2323397213. The cubic root of 20153207 is about 272.1331122902.

Adding to 20153207 its reverse (70235102), we get a palindrome (90388309).

The spelling of 20153207 in words is "twenty million, one hundred fifty-three thousand, two hundred seven".