1821716892 has 30 divisors (see below), whose sum is σ = 4762328648. Its totient is φ = 607238856.

The previous prime is 1821716861. The next prime is 1821716893. The reversal of 1821716892 is 2986171281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821716893) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2810968 + ... + 2811615.

Almost surely, 2^1821716892 is an apocalyptic number.

1821716892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1821716892 is an abundant number, since it is smaller than the sum of its proper divisors (2940611756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1821716892 is a wasteful number, since it uses less digits than its factorization.

1821716892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5622599 (or 5622588 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 1821716892 is about 42681.5755566732. The cubic root of 1821716892 is about 1221.3129491398.

The spelling of 1821716892 in words is "one billion, eight hundred twenty-one million, seven hundred sixteen thousand, eight hundred ninety-two".