68000020 has 24 divisors (see below), whose sum is σ = 155782368. Its totient is φ = 24727200.

The previous prime is 68000003. The next prime is 68000021. The reversal of 68000020 is 2000086.

It is a junction number, because it is equal to n+sod(n) for n = 67999958 and 68000003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68000021) 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, 154326 + ... + 154765.

It is an arithmetic number, because the mean of its divisors is an integer number (6490932).

Almost surely, 2^68000020 is an apocalyptic number.

It is an amenable number.

68000020 is an abundant number, since it is smaller than the sum of its proper divisors (87782348).

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

68000020 is a wasteful number, since it uses less digits than its factorization.

68000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309111 (or 309109 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 68000020 is about 8246.2124639134. The cubic root of 68000020 is about 408.1655502080.

The spelling of 68000020 in words is "sixty-eight million, twenty", and thus it is an aban number and an uban number.