1836972180 has 36 divisors (see below), whose sum is σ = 5572149492. Its totient is φ = 489859200.

The previous prime is 1836972157. The next prime is 1836972197. The reversal of 1836972180 is 812796381.

It can be written as a sum of positive squares in 2 ways, for example, as 616727556 + 1220244624 = 24834^2 + 34932^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5102521 + ... + 5102880.

Almost surely, 2^1836972180 is an apocalyptic number.

1836972180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1836972180 is an abundant number, since it is smaller than the sum of its proper divisors (3735177312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1836972180 is a wasteful number, since it uses less digits than its factorization.

1836972180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10205416 (or 10205411 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1836972180 is about 42859.9134390166. The cubic root of 1836972180 is about 1224.7126200785.

The spelling of 1836972180 in words is "one billion, eight hundred thirty-six million, nine hundred seventy-two thousand, one hundred eighty".