21010350587 has 2 divisors, whose sum is σ = 21010350588. Its totient is φ = 21010350586.

The previous prime is 21010350469. The next prime is 21010350607. The reversal of 21010350587 is 78505301012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010350587 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010353587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505175293 + 10505175294.

It is an arithmetic number, because the mean of its divisors is an integer number (10505175294).

Almost surely, 2^21010350587 is an apocalyptic number.

21010350587 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010350587 is an equidigital number, since it uses as much as digits as its factorization.

21010350587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 32.

Adding to 21010350587 its reverse (78505301012), we get a palindrome (99515651599).

The spelling of 21010350587 in words is "twenty-one billion, ten million, three hundred fifty thousand, five hundred eighty-seven".