21401142017 has 8 divisors (see below), whose sum is σ = 21824226816. Its totient is φ = 20981568672.

The previous prime is 21401142001. The next prime is 21401142041. The reversal of 21401142017 is 71024110412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21401142017 - 2⁴ = 21401142001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21401141983 and 21401142001.

It is not an unprimeable number, because it can be changed into a prime (21401142517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865553 + ... + 889934.

It is an arithmetic number, because the mean of its divisors is an integer number (2728028352).

Almost surely, 2^21401142017 is an apocalyptic number.

It is an amenable number.

21401142017 is a deficient number, since it is larger than the sum of its proper divisors (423084799).

21401142017 is a wasteful number, since it uses less digits than its factorization.

21401142017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755727.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 21401142017 its reverse (71024110412), we get a palindrome (92425252429).

The spelling of 21401142017 in words is "twenty-one billion, four hundred one million, one hundred forty-two thousand, seventeen".