20275247 has 2 divisors, whose sum is σ = 20275248. Its totient is φ = 20275246.

The previous prime is 20275219. The next prime is 20275253. The reversal of 20275247 is 74257202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20275247 - 2¹⁰ = 20274223 is a prime.

It is a super-2 number, since 2×20275247² = 822171281822018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20275207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10137623 + 10137624.

It is an arithmetic number, because the mean of its divisors is an integer number (10137624).

Almost surely, 2^20275247 is an apocalyptic number.

20275247 is a deficient number, since it is larger than the sum of its proper divisors (1).

20275247 is an equidigital number, since it uses as much as digits as its factorization.

20275247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 20275247 is about 4502.8043484033. The cubic root of 20275247 is about 272.6813180382.

The spelling of 20275247 in words is "twenty million, two hundred seventy-five thousand, two hundred forty-seven".