1820010100056 has 32 divisors (see below), whose sum is σ = 4550158378800. Its totient is φ = 606652282880.

The previous prime is 1820010100001. The next prime is 1820010100057. The reversal of 1820010100056 is 6500010100281.

It is a super-2 number, since 2×1820010100056² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1820010099999 and 1820010100035.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820010100057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258741 + ... + 1925348.

Almost surely, 2^{1820010100056} is an apocalyptic number.

It is an amenable number.

1820010100056 is an abundant number, since it is smaller than the sum of its proper divisors (2730148278744).

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

1820010100056 is a wasteful number, since it uses less digits than its factorization.

1820010100056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218819 (or 2218815 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The spelling of 1820010100056 in words is "one trillion, eight hundred twenty billion, ten million, one hundred thousand, fifty-six".