19430536500 has 384 divisors, whose sum is σ = 67176345600. Its totient is φ = 4838400000.

The previous prime is 19430536483. The next prime is 19430536519. The reversal of 19430536500 is 563503491.

19430536500 is a `hidden beast` number, since 1 + 94 + 30 + 5 + 36 + 500 = 666.

It is a super-3 number, since 3×19430536500³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12135700 + ... + 12137300.

It is an arithmetic number, because the mean of its divisors is an integer number (174938400).

Almost surely, 2^19430536500 is an apocalyptic number.

19430536500 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 19430536500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33588172800).

19430536500 is an abundant number, since it is smaller than the sum of its proper divisors (47745809100).

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

19430536500 is a wasteful number, since it uses less digits than its factorization.

19430536500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689 (or 1671 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The spelling of 19430536500 in words is "nineteen billion, four hundred thirty million, five hundred thirty-six thousand, five hundred".