19402750000 has 70 divisors (see below), whose sum is σ = 46991039132. Its totient is φ = 7761000000.

The previous prime is 19402749979. The next prime is 19402750007. The reversal of 19402750000 is 5720491.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19402750007) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 211195 + ... + 288805.

Almost surely, 2^19402750000 is an apocalyptic number.

19402750000 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 19402750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23495519566).

19402750000 is an abundant number, since it is smaller than the sum of its proper divisors (27588289132).

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

19402750000 is an frugal number, since it uses more digits than its factorization.

19402750000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77649 (or 77618 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The spelling of 19402750000 in words is "nineteen billion, four hundred two million, seven hundred fifty thousand".