17157420105 has 16 divisors (see below), whose sum is σ = 31373568384. Its totient is φ = 7843392000.

The previous prime is 17157420097. The next prime is 17157420127. The reversal of 17157420105 is 50102475171.

It is not a de Polignac number, because 17157420105 - 2³ = 17157420097 is a prime.

It is a super-2 number, since 2×17157420105² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81701896 + ... + 81702105.

It is an arithmetic number, because the mean of its divisors is an integer number (1960848024).

Almost surely, 2^17157420105 is an apocalyptic number.

17157420105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17157420105 is a deficient number, since it is larger than the sum of its proper divisors (14216148279).

17157420105 is a wasteful number, since it uses less digits than its factorization.

17157420105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163404016.

The product of its (nonzero) digits is 9800, while the sum is 33.

Adding to 17157420105 its reverse (50102475171), we get a palindrome (67259895276).

The spelling of 17157420105 in words is "seventeen billion, one hundred fifty-seven million, four hundred twenty thousand, one hundred five".