21298286017 has 4 divisors (see below), whose sum is σ = 21298864576. Its totient is φ = 21297707460.

The previous prime is 21298285927. The next prime is 21298286057. The reversal of 21298286017 is 71068289212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21298286017 - 2⁷ = 21298285889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21298286057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230013 + ... + 309034.

It is an arithmetic number, because the mean of its divisors is an integer number (5324716144).

Almost surely, 2^21298286017 is an apocalyptic number.

It is an amenable number.

21298286017 is a deficient number, since it is larger than the sum of its proper divisors (578559).

21298286017 is an equidigital number, since it uses as much as digits as its factorization.

21298286017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578558.

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 21298286017 in words is "twenty-one billion, two hundred ninety-eight million, two hundred eighty-six thousand, seventeen".