1803054421 has 6 divisors (see below), whose sum is σ = 2097430710. Its totient is φ = 1545475176.

The previous prime is 1803054361. The next prime is 1803054427. The reversal of 1803054421 is 1244503081.

It can be written as a sum of positive squares in only one way, i.e., 1237280625 + 565773796 = 35175^2 + 23786^2 .

It is not a de Polignac number, because 1803054421 - 2⁹ = 1803053909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1803054421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803054427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18398466 + ... + 18398563.

It is an arithmetic number, because the mean of its divisors is an integer number (349571785).

Almost surely, 2^1803054421 is an apocalyptic number.

It is an amenable number.

1803054421 is a deficient number, since it is larger than the sum of its proper divisors (294376289).

1803054421 is an equidigital number, since it uses as much as digits as its factorization.

1803054421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36797043 (or 36797036 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1803054421 is about 42462.3883101269. The cubic root of 1803054421 is about 1217.1280697547.

The spelling of 1803054421 in words is "one billion, eight hundred three million, fifty-four thousand, four hundred twenty-one".