19603018400 has 216 divisors, whose sum is σ = 57031529436. Its totient is φ = 6556569600.

The previous prime is 19603018399. The next prime is 19603018403. The reversal of 19603018400 is 481030691.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4014996496 + 15588021904 = 63364^2 + 124852^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (19603018403) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 1601102 + ... + 1613298.

Almost surely, 2^19603018400 is an apocalyptic number.

19603018400 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 19603018400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28515764718).

19603018400 is an abundant number, since it is smaller than the sum of its proper divisors (37428511036).

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

19603018400 is a wasteful number, since it uses less digits than its factorization.

19603018400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12272 (or 12252 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 19603018400 in words is "nineteen billion, six hundred three million, eighteen thousand, four hundred".