192040821 has 16 divisors (see below), whose sum is σ = 325148800. Its totient is φ = 109737504.

The previous prime is 192040799. The next prime is 192040829. The reversal of 192040821 is 128040291.

It is not a de Polignac number, because 192040821 - 2⁶ = 192040757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (192040829) 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 15 ways as a sum of consecutive naturals, for example, 507856 + ... + 508233.

It is an arithmetic number, because the mean of its divisors is an integer number (20321800).

Almost surely, 2^192040821 is an apocalyptic number.

It is an amenable number.

192040821 is a deficient number, since it is larger than the sum of its proper divisors (133107979).

192040821 is a wasteful number, since it uses less digits than its factorization.

192040821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016105 (or 1016099 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 192040821 is about 13857.8793832245. The cubic root of 192040821 is about 576.9407099964.

The spelling of 192040821 in words is "one hundred ninety-two million, forty thousand, eight hundred twenty-one".