1816621034 has 16 divisors (see below), whose sum is σ = 2740270176. Its totient is φ = 903210000.

The previous prime is 1816621019. The next prime is 1816621039. The reversal of 1816621034 is 4301266181.

It is a super-2 number, since 2×1816621034² = 6600223962342458312, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1816621039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344264 + ... + 349500.

It is an arithmetic number, because the mean of its divisors is an integer number (171266886).

Almost surely, 2^1816621034 is an apocalyptic number.

1816621034 is a deficient number, since it is larger than the sum of its proper divisors (923649142).

1816621034 is a wasteful number, since it uses less digits than its factorization.

1816621034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6181.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1816621034 is about 42621.8375249120. The cubic root of 1816621034 is about 1220.1730995988.

The spelling of 1816621034 in words is "one billion, eight hundred sixteen million, six hundred twenty-one thousand, thirty-four".