1922869021 has 4 divisors (see below), whose sum is σ = 1974838492. Its totient is φ = 1870899552.

The previous prime is 1922869009. The next prime is 1922869033. The reversal of 1922869021 is 1209682291.

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

It is an interprime number because it is at equal distance from previous prime (1922869009) and next prime (1922869033).

It can be written as a sum of positive squares in 2 ways, for example, as 654796921 + 1268072100 = 25589^2 + 35610^2 .

It is a cyclic number.

It is not a de Polignac number, because 1922869021 - 2²⁵ = 1889314589 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 (1922869001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25984680 + ... + 25984753.

It is an arithmetic number, because the mean of its divisors is an integer number (493709623).

Almost surely, 2^1922869021 is an apocalyptic number.

It is an amenable number.

1922869021 is a deficient number, since it is larger than the sum of its proper divisors (51969471).

1922869021 is an equidigital number, since it uses as much as digits as its factorization.

1922869021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51969470.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1922869021 is about 43850.5304528919. The cubic root of 1922869021 is about 1243.5117717307.

The spelling of 1922869021 in words is "one billion, nine hundred twenty-two million, eight hundred sixty-nine thousand, twenty-one".