1836045981 has 128 divisors (see below), whose sum is σ = 3641241600. Its totient is φ = 885530880.

The previous prime is 1836045979. The next prime is 1836045989. The reversal of 1836045981 is 1895406381.

It is not a de Polignac number, because 1836045981 - 2¹ = 1836045979 is a prime.

It is a super-2 number, since 2×1836045981² = 6742129688692504722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1836045989) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2093115 + ... + 2093991.

It is an arithmetic number, because the mean of its divisors is an integer number (28447200).

Almost surely, 2^1836045981 is an apocalyptic number.

1836045981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1836045981 is a deficient number, since it is larger than the sum of its proper divisors (1805195619).

1836045981 is a wasteful number, since it uses less digits than its factorization.

1836045981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1836045981 is about 42849.1071202190. The cubic root of 1836045981 is about 1224.5067526349.

The spelling of 1836045981 in words is "one billion, eight hundred thirty-six million, forty-five thousand, nine hundred eighty-one".