1920244865 has 32 divisors (see below), whose sum is σ = 2905217280. Its totient is φ = 1183564800.

The previous prime is 1920244853. The next prime is 1920244901. The reversal of 1920244865 is 5684420291.

It is not a de Polignac number, because 1920244865 - 2⁸ = 1920244609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6245 + ... + 62285.

It is an arithmetic number, because the mean of its divisors is an integer number (90788040).

Almost surely, 2^1920244865 is an apocalyptic number.

It is an amenable number.

1920244865 is a deficient number, since it is larger than the sum of its proper divisors (984972415).

1920244865 is a wasteful number, since it uses less digits than its factorization.

1920244865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56153.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 1920244865 is about 43820.5986380834. The cubic root of 1920244865 is about 1242.9458371138.

The spelling of 1920244865 in words is "one billion, nine hundred twenty million, two hundred forty-four thousand, eight hundred sixty-five".