1821490966 has 16 divisors (see below), whose sum is σ = 2750555808. Its totient is φ = 904651200.

The previous prime is 1821490919. The next prime is 1821490987. The reversal of 1821490966 is 6690941281.

It is a happy number.

It is a super-2 number, since 2×1821490966² = 6635658678439226312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371511 + ... + 376381.

It is an arithmetic number, because the mean of its divisors is an integer number (171909738).

Almost surely, 2^1821490966 is an apocalyptic number.

1821490966 is a deficient number, since it is larger than the sum of its proper divisors (929064842).

1821490966 is a wasteful number, since it uses less digits than its factorization.

1821490966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6087.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 1821490966 is about 42678.9288291072. The cubic root of 1821490966 is about 1221.2624587191.

The spelling of 1821490966 in words is "one billion, eight hundred twenty-one million, four hundred ninety thousand, nine hundred sixty-six".