1992420218879 has 8 divisors (see below), whose sum is σ = 2025836671488. Its totient is φ = 1959028083360.

The previous prime is 1992420218843. The next prime is 1992420218917. The reversal of 1992420218879 is 9788120242991.

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 1992420218879 - 2⁸ = 1992420218623 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 (1992420212879) 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, 5913992 + ... + 6241805.

It is an arithmetic number, because the mean of its divisors is an integer number (253229583936).

Almost surely, 2^{1992420218879} is an apocalyptic number.

1992420218879 is a deficient number, since it is larger than the sum of its proper divisors (33416452609).

1992420218879 is a wasteful number, since it uses less digits than its factorization.

1992420218879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12158545.

The product of its (nonzero) digits is 10450944, while the sum is 62.

The spelling of 1992420218879 in words is "one trillion, nine hundred ninety-two billion, four hundred twenty million, two hundred eighteen thousand, eight hundred seventy-nine".