1821193002 has 24 divisors (see below), whose sum is σ = 4012800480. Its totient is φ = 596774760.

The previous prime is 1821193001. The next prime is 1821193009. The reversal of 1821193002 is 2003911281.

It is not an unprimeable number, because it can be changed into a prime (1821193001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 856374 + ... + 858497.

It is an arithmetic number, because the mean of its divisors is an integer number (167200020).

Almost surely, 2^1821193002 is an apocalyptic number.

1821193002 is an abundant number, since it is smaller than the sum of its proper divisors (2191607478).

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

1821193002 is a wasteful number, since it uses less digits than its factorization.

1821193002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714938 (or 1714935 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1821193002 is about 42675.4379239393. The cubic root of 1821193002 is about 1221.1958627092.

The spelling of 1821193002 in words is "one billion, eight hundred twenty-one million, one hundred ninety-three thousand, two".