21163017 has 8 divisors (see below), whose sum is σ = 29702560. Its totient is φ = 13366080.

The previous prime is 21163003. The next prime is 21163033. The reversal of 21163017 is 71036112.

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

It is not a de Polignac number, because 21163017 - 2¹¹ = 21160969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21162984 and 21163002.

It is not an unprimeable number, because it can be changed into a prime (21163057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185584 + ... + 185697.

It is an arithmetic number, because the mean of its divisors is an integer number (3712820).

Almost surely, 2^21163017 is an apocalyptic number.

It is an amenable number.

21163017 is a deficient number, since it is larger than the sum of its proper divisors (8539543).

21163017 is a wasteful number, since it uses less digits than its factorization.

21163017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371303.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 21163017 is about 4600.3279230942. The cubic root of 21163017 is about 276.6044696560.

Adding to 21163017 its reverse (71036112), we get a palindrome (92199129).

The spelling of 21163017 in words is "twenty-one million, one hundred sixty-three thousand, seventeen".