1856364020220 has 48 divisors (see below), whose sum is σ = 5423811402240. Its totient is φ = 473507343936.

The previous prime is 1856364020219. The next prime is 1856364020281. The reversal of 1856364020220 is 220204636581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672594280 + ... + 672597039.

It is an arithmetic number, because the mean of its divisors is an integer number (112996070880).

Almost surely, 2^{1856364020220} is an apocalyptic number.

1856364020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1856364020220 is an abundant number, since it is smaller than the sum of its proper divisors (3567447382020).

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

1856364020220 is a wasteful number, since it uses less digits than its factorization.

1856364020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345191354 (or 1345191352 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 1856364020220 in words is "one trillion, eight hundred fifty-six billion, three hundred sixty-four million, twenty thousand, two hundred twenty".