1923881945 has 16 divisors (see below), whose sum is σ = 2319528960. Its totient is φ = 1531879104.

The previous prime is 1923881929. The next prime is 1923881957. The reversal of 1923881945 is 5491883291.

It is a cyclic number.

It is not a de Polignac number, because 1923881945 - 2⁴ = 1923881929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1923881893 and 1923881902.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1203887 + ... + 1205483.

It is an arithmetic number, because the mean of its divisors is an integer number (144970560).

Almost surely, 2^1923881945 is an apocalyptic number.

It is an amenable number.

1923881945 is a deficient number, since it is larger than the sum of its proper divisors (395647015).

1923881945 is a wasteful number, since it uses less digits than its factorization.

1923881945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584.

The product of its digits is 622080, while the sum is 50.

The square root of 1923881945 is about 43862.0786671129. The cubic root of 1923881945 is about 1243.7300847126.

The spelling of 1923881945 in words is "one billion, nine hundred twenty-three million, eight hundred eighty-one thousand, nine hundred forty-five".