68135020 has 24 divisors (see below), whose sum is σ = 144118800. Its totient is φ = 27056832.

The previous prime is 68134999. The next prime is 68135027. The reversal of 68135020 is 2053186.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (68135027) 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, 9475 + ... + 15034.

It is an arithmetic number, because the mean of its divisors is an integer number (6004950).

Almost surely, 2^68135020 is an apocalyptic number.

It is an amenable number.

68135020 is an abundant number, since it is smaller than the sum of its proper divisors (75983780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68135020 is a wasteful number, since it uses less digits than its factorization.

68135020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24657 (or 24655 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 68135020 is about 8254.3939813895. The cubic root of 68135020 is about 408.4354811318.

The spelling of 68135020 in words is "sixty-eight million, one hundred thirty-five thousand, twenty".