1818951732 has 108 divisors (see below), whose sum is σ = 5073636204. Its totient is φ = 549020160.

The previous prime is 1818951727. The next prime is 1818951733. The reversal of 1818951732 is 2371598181.

It can be written as a sum of positive squares in 6 ways, for example, as 7257636 + 1811694096 = 2694^2 + 42564^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818951733) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 319632 + ... + 325272.

It is an arithmetic number, because the mean of its divisors is an integer number (46978113).

Almost surely, 2^1818951732 is an apocalyptic number.

1818951732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1818951732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2536818102).

1818951732 is an abundant number, since it is smaller than the sum of its proper divisors (3254684472).

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

1818951732 is a wasteful number, since it uses less digits than its factorization.

1818951732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5730 (or 5712 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 1818951732 is about 42649.1703553539. The cubic root of 1818951732 is about 1220.6946979597.

The spelling of 1818951732 in words is "one billion, eight hundred eighteen million, nine hundred fifty-one thousand, seven hundred thirty-two".