1820411963 has 4 divisors (see below), whose sum is σ = 1840866120. Its totient is φ = 1799957808.

The previous prime is 1820411947. The next prime is 1820411987. The reversal of 1820411963 is 3691140281.

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

It is a cyclic number.

It is not a de Polignac number, because 1820411963 - 2⁴ = 1820411947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1820411903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10226945 + ... + 10227122.

It is an arithmetic number, because the mean of its divisors is an integer number (460216530).

Almost surely, 2^1820411963 is an apocalyptic number.

1820411963 is a deficient number, since it is larger than the sum of its proper divisors (20454157).

1820411963 is an equidigital number, since it uses as much as digits as its factorization.

1820411963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20454156.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1820411963 is about 42666.2860230417. The cubic root of 1820411963 is about 1221.0212632431.

The spelling of 1820411963 in words is "one billion, eight hundred twenty million, four hundred eleven thousand, nine hundred sixty-three".