21287341087076 has 12 divisors (see below), whose sum is σ = 39213523055280. Its totient is φ = 10083477357000.

The previous prime is 21287341087007. The next prime is 21287341087081. The reversal of 21287341087076 is 67078014378212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140048296550 + ... + 140048296701.

It is an arithmetic number, because the mean of its divisors is an integer number (3267793587940).

Almost surely, 2^{21287341087076} is an apocalyptic number.

It is an amenable number.

21287341087076 is a deficient number, since it is larger than the sum of its proper divisors (17926181968204).

21287341087076 is a wasteful number, since it uses less digits than its factorization.

21287341087076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280096593274 (or 280096593272 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 56.

The spelling of 21287341087076 in words is "twenty-one trillion, two hundred eighty-seven billion, three hundred forty-one million, eighty-seven thousand, seventy-six".