1920171892 has 12 divisors (see below), whose sum is σ = 3369459520. Its totient is φ = 957469176.

The previous prime is 1920171853. The next prime is 1920171907. The reversal of 1920171892 is 2981710291.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652542 + ... + 655477.

Almost surely, 2^1920171892 is an apocalyptic number.

It is an amenable number.

1920171892 is a deficient number, since it is larger than the sum of its proper divisors (1449287628).

1920171892 is a wasteful number, since it uses less digits than its factorization.

1920171892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308390 (or 1308388 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1920171892 is about 43819.7659966367. The cubic root of 1920171892 is about 1242.9300921365.

The spelling of 1920171892 in words is "one billion, nine hundred twenty million, one hundred seventy-one thousand, eight hundred ninety-two".