256180020 has 24 divisors (see below), whose sum is σ = 717304224. Its totient is φ = 68314656.

The previous prime is 256179941. The next prime is 256180031. The reversal of 256180020 is 20081652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2134774 + ... + 2134893.

It is an arithmetic number, because the mean of its divisors is an integer number (29887676).

Almost surely, 2^256180020 is an apocalyptic number.

256180020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256180020 is an abundant number, since it is smaller than the sum of its proper divisors (461124204).

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

256180020 is a wasteful number, since it uses less digits than its factorization.

256180020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4269679 (or 4269677 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 256180020 is about 16005.6246363583. The cubic root of 256180020 is about 635.1092212978.

The spelling of 256180020 in words is "two hundred fifty-six million, one hundred eighty thousand, twenty".