19423682450 has 12 divisors (see below), whose sum is σ = 36128049450. Its totient is φ = 7769472960.

The previous prime is 19423682449. The next prime is 19423682477. The reversal of 19423682450 is 5428632491.

It can be written as a sum of positive squares in 3 ways, for example, as 18907075009 + 516607441 = 137503^2 + 22729^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 194236775 + ... + 194236874.

Almost surely, 2^19423682450 is an apocalyptic number.

19423682450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19423682450 is a deficient number, since it is larger than the sum of its proper divisors (16704367000).

19423682450 is a wasteful number, since it uses less digits than its factorization.

19423682450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388473661 (or 388473656 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 19423682450 in words is "nineteen billion, four hundred twenty-three million, six hundred eighty-two thousand, four hundred fifty".