1821913214 has 48 divisors (see below), whose sum is σ = 3235921920. Its totient is φ = 766510800.

The previous prime is 1821913199. The next prime is 1821913229. The reversal of 1821913214 is 4123191281.

It is an interprime number because it is at equal distance from previous prime (1821913199) and next prime (1821913229).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167267 + ... + 177825.

It is an arithmetic number, because the mean of its divisors is an integer number (67415040).

Almost surely, 2^1821913214 is an apocalyptic number.

1821913214 is a deficient number, since it is larger than the sum of its proper divisors (1414008706).

1821913214 is a wasteful number, since it uses less digits than its factorization.

1821913214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10637 (or 10626 counting only the distinct ones).

The product of its digits is 3456, while the sum is 32.

The square root of 1821913214 is about 42683.8753395237. The cubic root of 1821913214 is about 1221.3568202062.

The spelling of 1821913214 in words is "one billion, eight hundred twenty-one million, nine hundred thirteen thousand, two hundred fourteen".