100256020 has 24 divisors (see below), whose sum is σ = 212473800. Its totient is φ = 39733632.

The previous prime is 100255979. The next prime is 100256041. The reversal of 100256020 is 20652001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 535824 + 99720196 = 732^2 + 9986^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100255985 and 100256003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20815 + ... + 25174.

It is an arithmetic number, because the mean of its divisors is an integer number (8853075).

Almost surely, 2^100256020 is an apocalyptic number.

100256020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100256020 is an abundant number, since it is smaller than the sum of its proper divisors (112217780).

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

100256020 is a wasteful number, since it uses less digits than its factorization.

100256020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46107 (or 46105 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 100256020 is about 10012.7928171914. The cubic root of 100256020 is about 464.5546589893.

The spelling of 100256020 in words is "one hundred million, two hundred fifty-six thousand, twenty".