1912003220 has 12 divisors (see below), whose sum is σ = 4015206804. Its totient is φ = 764801280.

The previous prime is 1912003201. The next prime is 1912003229. The reversal of 1912003220 is 223002191.

1912003220 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1060414096 + 851589124 = 32564^2 + 29182^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 95600161 = 1912003220 / (1 + 9 + 1 + 2 + 0 + 0 + 3 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1912003192 and 1912003201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1912003229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47800061 + ... + 47800100.

It is an arithmetic number, because the mean of its divisors is an integer number (334600567).

Almost surely, 2^1912003220 is an apocalyptic number.

1912003220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1912003220 is an abundant number, since it is smaller than the sum of its proper divisors (2103203584).

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

1912003220 is a wasteful number, since it uses less digits than its factorization.

1912003220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95600170 (or 95600168 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1912003220 is about 43726.4590379784. The cubic root of 1912003220 is about 1241.1650557272.

The spelling of 1912003220 in words is "one billion, nine hundred twelve million, three thousand, two hundred twenty".