19210381450 has 24 divisors (see below), whose sum is σ = 38479873068. Its totient is φ = 7093063680.

The previous prime is 19210381403. The next prime is 19210381453. The reversal of 19210381450 is 5418301291.

It can be written as a sum of positive squares in 6 ways, for example, as 1039611049 + 18170770401 = 32243^2 + 134799^2 .

It is not an unprimeable number, because it can be changed into a prime (19210381453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14776567 + ... + 14777866.

Almost surely, 2^19210381450 is an apocalyptic number.

19210381450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19210381450 is an abundant number, since it is smaller than the sum of its proper divisors (19269491618).

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

19210381450 is a wasteful number, since it uses less digits than its factorization.

19210381450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29554458 (or 29554453 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 19210381450 in words is "nineteen billion, two hundred ten million, three hundred eighty-one thousand, four hundred fifty".