18374535400 has 192 divisors, whose sum is σ = 47641794480. Its totient is φ = 6547046400.

The previous prime is 18374535379. The next prime is 18374535437. The reversal of 18374535400 is 453547381.

It can be written as a sum of positive squares in 24 ways, for example, as 6577534404 + 11797000996 = 81102^2 + 108614^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10339312 + ... + 10341088.

Almost surely, 2^18374535400 is an apocalyptic number.

18374535400 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 18374535400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23820897240).

18374535400 is an abundant number, since it is smaller than the sum of its proper divisors (29267259080).

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

18374535400 is a wasteful number, since it uses less digits than its factorization.

18374535400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944 (or 1935 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 18374535400 in words is "eighteen billion, three hundred seventy-four million, five hundred thirty-five thousand, four hundred".