168020135 has 16 divisors (see below), whose sum is σ = 217176960. Its totient is φ = 124377120.

The previous prime is 168020131. The next prime is 168020143. The reversal of 168020135 is 531020861.

It is not a de Polignac number, because 168020135 - 2² = 168020131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168020131) 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, 16481 + ... + 24650.

It is an arithmetic number, because the mean of its divisors is an integer number (13573560).

Almost surely, 2^168020135 is an apocalyptic number.

168020135 is a deficient number, since it is larger than the sum of its proper divisors (49156825).

168020135 is a wasteful number, since it uses less digits than its factorization.

168020135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41198.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 168020135 is about 12962.2580980321. The cubic root of 168020135 is about 551.8068784187.

Adding to 168020135 its reverse (531020861), we get a palindrome (699040996).

The spelling of 168020135 in words is "one hundred sixty-eight million, twenty thousand, one hundred thirty-five".