1801444423 has 4 divisors (see below), whose sum is σ = 1907411760. Its totient is φ = 1695477088.

The previous prime is 1801444369. The next prime is 1801444427. The reversal of 1801444423 is 3244441081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3244441081 = 7 ⋅463491583.

It is a cyclic number.

It is not a de Polignac number, because 1801444423 - 2¹⁷ = 1801313351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801444427) 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, 52983643 + ... + 52983676.

It is an arithmetic number, because the mean of its divisors is an integer number (476852940).

Almost surely, 2^1801444423 is an apocalyptic number.

1801444423 is a deficient number, since it is larger than the sum of its proper divisors (105967337).

1801444423 is a wasteful number, since it uses less digits than its factorization.

1801444423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105967336.

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 1801444423 is about 42443.4261458709. The cubic root of 1801444423 is about 1216.7656925801.

It can be divided in two parts, 1801 and 444423, that added together give a square (446224 = 668²).

The spelling of 1801444423 in words is "one billion, eight hundred one million, four hundred forty-four thousand, four hundred twenty-three".