1819693916 has 12 divisors (see below), whose sum is σ = 3352067880. Its totient is φ = 861960240.

The previous prime is 1819693913. The next prime is 1819693919. The reversal of 1819693916 is 6193969181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1819693913) and next prime (1819693919).

It is a super-2 number, since 2×1819693916² = 6622571895854830112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819693913) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11971595 + ... + 11971746.

It is an arithmetic number, because the mean of its divisors is an integer number (279338990).

Almost surely, 2^1819693916 is an apocalyptic number.

It is an amenable number.

1819693916 is a deficient number, since it is larger than the sum of its proper divisors (1532373964).

1819693916 is a wasteful number, since it uses less digits than its factorization.

1819693916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23943364 (or 23943362 counting only the distinct ones).

The product of its digits is 629856, while the sum is 53.

The square root of 1819693916 is about 42657.8705047498. The cubic root of 1819693916 is about 1220.8607014264.

The spelling of 1819693916 in words is "one billion, eight hundred nineteen million, six hundred ninety-three thousand, nine hundred sixteen".