17000157021 has 16 divisors (see below), whose sum is σ = 22909083648. Its totient is φ = 11212858800.

The previous prime is 17000157017. The next prime is 17000157023. The reversal of 17000157021 is 12075100071.

It is a happy number.

It is not a de Polignac number, because 17000157021 - 2² = 17000157017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 17000156982 and 17000157000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17000157023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64740 + ... + 195426.

It is an arithmetic number, because the mean of its divisors is an integer number (1431817728).

Almost surely, 2^17000157021 is an apocalyptic number.

It is an amenable number.

17000157021 is a deficient number, since it is larger than the sum of its proper divisors (5908926627).

17000157021 is a wasteful number, since it uses less digits than its factorization.

17000157021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131152.

The product of its (nonzero) digits is 490, while the sum is 24.

Adding to 17000157021 its reverse (12075100071), we get a palindrome (29075257092).

The spelling of 17000157021 in words is "seventeen billion, one hundred fifty-seven thousand, twenty-one".