1820491796 has 24 divisors (see below), whose sum is σ = 3290232960. Its totient is φ = 880860992.

The previous prime is 1820491793. The next prime is 1820491807. The reversal of 1820491796 is 6971940281.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 1820491796.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820491793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37670 + ... + 71133.

It is an arithmetic number, because the mean of its divisors is an integer number (137093040).

Almost surely, 2^1820491796 is an apocalyptic number.

It is an amenable number.

1820491796 is a deficient number, since it is larger than the sum of its proper divisors (1469741164).

1820491796 is a wasteful number, since it uses less digits than its factorization.

1820491796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108943 (or 108941 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 1820491796 is about 42667.2215641000. The cubic root of 1820491796 is about 1221.0391120172.

The spelling of 1820491796 in words is "one billion, eight hundred twenty million, four hundred ninety-one thousand, seven hundred ninety-six".