18277835940 has 432 divisors, whose sum is σ = 73549253232. Its totient is φ = 3629187072.

The previous prime is 18277835899. The next prime is 18277835951. The reversal of 18277835940 is 4953877281.

It is a happy number.

18277835940 is a `hidden beast` number, since 18 + 277 + 8 + 359 + 4 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2061341604 + 16216494336 = 45402^2 + 127344^2 .

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 143 ways as a sum of consecutive naturals, for example, 1944532 + ... + 1953908.

It is an arithmetic number, because the mean of its divisors is an integer number (170252901).

Almost surely, 2^18277835940 is an apocalyptic number.

18277835940 is a gapful number since it is divisible by the number (10) 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 18277835940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36774626616).

18277835940 is an abundant number, since it is smaller than the sum of its proper divisors (55271417292).

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

18277835940 is a wasteful number, since it uses less digits than its factorization.

18277835940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9436 (or 9424 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 18277835940 in words is "eighteen billion, two hundred seventy-seven million, eight hundred thirty-five thousand, nine hundred forty".