1842160021 has 4 divisors (see below), whose sum is σ = 1983864652. Its totient is φ = 1700455392.

The previous prime is 1842160007. The next prime is 1842160039. The reversal of 1842160021 is 1200612481.

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 481583025 + 1360576996 = 21945^2 + 36886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1842160021 - 2⁵ = 1842159989 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 (1842160051) 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, 70852296 + ... + 70852321.

It is an arithmetic number, because the mean of its divisors is an integer number (495966163).

Almost surely, 2^1842160021 is an apocalyptic number.

It is an amenable number.

1842160021 is a deficient number, since it is larger than the sum of its proper divisors (141704631).

1842160021 is a wasteful number, since it uses less digits than its factorization.

1842160021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141704630.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1842160021 is about 42920.3916687628. The cubic root of 1842160021 is about 1225.8644507273.

The spelling of 1842160021 in words is "one billion, eight hundred forty-two million, one hundred sixty thousand, twenty-one".