36981851220 has 144 divisors (see below), whose sum is σ = 113027700240. Its totient is φ = 9787392000.

The previous prime is 36981851219. The next prime is 36981851267. The reversal of 36981851220 is 2215818963.

36981851220 is a `hidden beast` number, since 36 + 9 + 81 + 8 + 512 + 20 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2247328836 + 34734522384 = 47406^2 + 186372^2 .

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 (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23098420 + ... + 23100020.

It is an arithmetic number, because the mean of its divisors is an integer number (784914585).

Almost surely, 2^36981851220 is an apocalyptic number.

36981851220 is a gapful number since it is divisible by the number (30) 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 36981851220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56513850120).

36981851220 is an abundant number, since it is smaller than the sum of its proper divisors (76045849020).

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

36981851220 is a wasteful number, since it uses less digits than its factorization.

36981851220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506 (or 2501 counting only the distinct ones).

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

The spelling of 36981851220 in words is "thirty-six billion, nine hundred eighty-one million, eight hundred fifty-one thousand, two hundred twenty".