20240287 has 2 divisors, whose sum is σ = 20240288. Its totient is φ = 20240286.

The previous prime is 20240281. The next prime is 20240293. The reversal of 20240287 is 78204202.

It is a balanced prime because it is at equal distance from previous prime (20240281) and next prime (20240293).

It is a cyclic number.

It is not a de Polignac number, because 20240287 - 2³ = 20240279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20240281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10120143 + 10120144.

It is an arithmetic number, because the mean of its divisors is an integer number (10120144).

Almost surely, 2^20240287 is an apocalyptic number.

20240287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20240287 is an equidigital number, since it uses as much as digits as its factorization.

20240287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 20240287 is about 4498.9206483333. The cubic root of 20240287 is about 272.5245024681.

Adding to 20240287 its reverse (78204202), we get a palindrome (98444489).

The spelling of 20240287 in words is "twenty million, two hundred forty thousand, two hundred eighty-seven".