10018087021 has 2 divisors, whose sum is σ = 10018087022. Its totient is φ = 10018087020.

The previous prime is 10018087019. The next prime is 10018087039. The reversal of 10018087021 is 12078081001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9738729225 + 279357796 = 98685^2 + 16714^2 .

It is a cyclic number.

It is not a de Polignac number, because 10018087021 - 2¹ = 10018087019 is a prime.

Together with 10018087019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10018088021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5009043510 + 5009043511.

It is an arithmetic number, because the mean of its divisors is an integer number (5009043511).

Almost surely, 2^10018087021 is an apocalyptic number.

It is an amenable number.

10018087021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10018087021 is an equidigital number, since it uses as much as digits as its factorization.

10018087021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 28.

The spelling of 10018087021 in words is "ten billion, eighteen million, eighty-seven thousand, twenty-one".