1920743642 has 8 divisors (see below), whose sum is σ = 2942415936. Its totient is φ = 939938332.

The previous prime is 1920743641. The next prime is 1920743647. The reversal of 1920743642 is 2463470291.

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

It is a super-2 number, since 2×1920743642² = 7378512276566848328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1920743596 and 1920743605.

It is not an unprimeable number, because it can be changed into a prime (1920743641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10216628 + ... + 10216815.

It is an arithmetic number, because the mean of its divisors is an integer number (367801992).

Almost surely, 2^1920743642 is an apocalyptic number.

1920743642 is a deficient number, since it is larger than the sum of its proper divisors (1021672294).

1920743642 is a wasteful number, since it uses less digits than its factorization.

1920743642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20433492.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 1920743642 is about 43826.2893934679. The cubic root of 1920743642 is about 1243.0534447664.

The spelling of 1920743642 in words is "one billion, nine hundred twenty million, seven hundred forty-three thousand, six hundred forty-two".