1920244869 has 6 divisors (see below), whose sum is σ = 2773687046. Its totient is φ = 1280163240.

The previous prime is 1920244853. The next prime is 1920244901. The reversal of 1920244869 is 9684420291.

It can be written as a sum of positive squares in only one way, i.e., 1860800769 + 59444100 = 43137^2 + 7710^2 .

It is not a de Polignac number, because 1920244869 - 2⁴ = 1920244853 is a prime.

It is a super-2 number, since 2×1920244869² = 7374680713841654322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920244819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106680262 + ... + 106680279.

Almost surely, 2^1920244869 is an apocalyptic number.

It is an amenable number.

1920244869 is a deficient number, since it is larger than the sum of its proper divisors (853442177).

1920244869 is a wasteful number, since it uses less digits than its factorization.

1920244869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213360547 (or 213360544 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 1920244869 is about 43820.5986837241. The cubic root of 1920244869 is about 1242.9458379769.

The spelling of 1920244869 in words is "one billion, nine hundred twenty million, two hundred forty-four thousand, eight hundred sixty-nine".