1920173849 has 8 divisors (see below), whose sum is σ = 2107280448. Its totient is φ = 1735158160.

The previous prime is 1920173813. The next prime is 1920173873. The reversal of 1920173849 is 9483710291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1920173849 - 2¹² = 1920169753 is a prime.

It is a super-2 number, since 2×1920173849² = 7374135220766949602, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1920173809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520802 + ... + 524475.

It is an arithmetic number, because the mean of its divisors is an integer number (263410056).

Almost surely, 2^1920173849 is an apocalyptic number.

It is an amenable number.

1920173849 is a deficient number, since it is larger than the sum of its proper divisors (187106599).

1920173849 is a wasteful number, since it uses less digits than its factorization.

1920173849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045455.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 1920173849 is about 43819.7883267366. The cubic root of 1920173849 is about 1242.9305143927.

The spelling of 1920173849 in words is "one billion, nine hundred twenty million, one hundred seventy-three thousand, eight hundred forty-nine".