1894024421 has 4 divisors (see below), whose sum is σ = 1902295500. Its totient is φ = 1885753344.

The previous prime is 1894024411. The next prime is 1894024459. The reversal of 1894024421 is 1244204981.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1116228100 + 777796321 = 33410^2 + 27889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1894024421 - 2⁶ = 1894024357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1894024411) 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, 4135196 + ... + 4135653.

It is an arithmetic number, because the mean of its divisors is an integer number (475573875).

Almost surely, 2^1894024421 is an apocalyptic number.

It is an amenable number.

1894024421 is a deficient number, since it is larger than the sum of its proper divisors (8271079).

1894024421 is an equidigital number, since it uses as much as digits as its factorization.

1894024421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8271078.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 1894024421 is about 43520.3908645132. The cubic root of 1894024421 is about 1237.2625226858.

The spelling of 1894024421 in words is "one billion, eight hundred ninety-four million, twenty-four thousand, four hundred twenty-one".