1806996081 has 16 divisors (see below), whose sum is σ = 2742635520. Its totient is φ = 1047533520.

The previous prime is 1806996077. The next prime is 1806996091.

1806996081 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1806996081 - 2² = 1806996077 is a prime.

It is a super-2 number, since 2×1806996081² = 6530469673498717122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1806996081.

It is not an unprimeable number, because it can be changed into a prime (1806996091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1189621 + ... + 1191138.

It is an arithmetic number, because the mean of its divisors is an integer number (171414720).

Almost surely, 2^1806996081 is an apocalyptic number.

1806996081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1806996081 is a deficient number, since it is larger than the sum of its proper divisors (935639439).

1806996081 is a wasteful number, since it uses less digits than its factorization.

1806996081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380796.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 1806996081 is about 42508.7765173264. The cubic root of 1806996081 is about 1218.0143460769.

The spelling of 1806996081 in words is "one billion, eight hundred six million, nine hundred ninety-six thousand, eighty-one".