20010215287 has 2 divisors, whose sum is σ = 20010215288. Its totient is φ = 20010215286.

The previous prime is 20010215233. The next prime is 20010215317. The reversal of 20010215287 is 78251201002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010215287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010215227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005107643 + 10005107644.

It is an arithmetic number, because the mean of its divisors is an integer number (10005107644).

Almost surely, 2^20010215287 is an apocalyptic number.

20010215287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010215287 is an equidigital number, since it uses as much as digits as its factorization.

20010215287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

Adding to 20010215287 its reverse (78251201002), we get a palindrome (98261416289).

The spelling of 20010215287 in words is "twenty billion, ten million, two hundred fifteen thousand, two hundred eighty-seven".