1920535109 has 4 divisors (see below), whose sum is σ = 1944845760. Its totient is φ = 1896224460.

The previous prime is 1920535093. The next prime is 1920535117. The reversal of 1920535109 is 9015350291.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9015350291 = 17 ⋅530314723.

It is a cyclic number.

It is not a de Polignac number, because 1920535109 - 2⁴ = 1920535093 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 (1920537109) 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, 12155207 + ... + 12155364.

It is an arithmetic number, because the mean of its divisors is an integer number (486211440).

Almost surely, 2^1920535109 is an apocalyptic number.

It is an amenable number.

1920535109 is a deficient number, since it is larger than the sum of its proper divisors (24310651).

1920535109 is an equidigital number, since it uses as much as digits as its factorization.

1920535109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24310650.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 1920535109 is about 43823.9102431538. The cubic root of 1920535109 is about 1243.0084574951.

The spelling of 1920535109 in words is "one billion, nine hundred twenty million, five hundred thirty-five thousand, one hundred nine".