1821671416342 has 4 divisors (see below), whose sum is σ = 2732507124516. Its totient is φ = 910835708170.

The previous prime is 1821671416337. The next prime is 1821671416361. The reversal of 1821671416342 is 2436141761281.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1821671416292 and 1821671416301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455417854084 + ... + 455417854087.

It is an arithmetic number, because the mean of its divisors is an integer number (683126781129).

Almost surely, 2^{1821671416342} is an apocalyptic number.

1821671416342 is a deficient number, since it is larger than the sum of its proper divisors (910835708174).

1821671416342 is an equidigital number, since it uses as much as digits as its factorization.

1821671416342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910835708173.

The product of its digits is 387072, while the sum is 46.

The spelling of 1821671416342 in words is "one trillion, eight hundred twenty-one billion, six hundred seventy-one million, four hundred sixteen thousand, three hundred forty-two".